Sitting in his seat while absentmindedly listening to his teacher's lesson, he stared at the screen in front of him, trying to figure out how his system worked.

  [Sinful System]

  Name: Ryou Akuma

  Race: Devil

  Level: 1

  Sin Points: 100

  Stats:

  Demonic Power: 10 (250/250)

  Strength: 5

  Endurance: 5

  Speed: 5

  Intelligence: 5

  Racial Skills:

  [Enhanced Sense: I] [Enhanced Strength: I] [Enhanced Endurance: I] [Night Vision] [Fly] [All Languages] [Light Weakness: V] [Holy Weakness: V]

  Inventory:

  - Chaos Orb (1)

  - Evil Piece (8)

  That's the only content of his system; there is nothing like a shop, quest, or some sort of purpose he must take. It just shows him stats and inventory.

  While his system is just barebones and nothing grandiose, he prefers it this way. He doesn't want some sort of almighty being giving him a system just because of boredom, although he still can't deny the possibility that this is indeed the case.

  Observing his system, he found two things he was curious about, and he immediately focused his mind on one of them.

  [Sin Point]

  [It can be used to increase the user level, stats, and skills, and the way to gather it is to do something sinful, like the Seven Deadly Sins.]

  "I see, so I just need to eat and have sex to gain Points."

  He thought in understanding, and he immediately tried to put some points into strength to see what happened.

  [Increase Strength stat by 1, cost: 10 Sin Points]

  [Yes] / [No]

  "So I can increase my stat every ten points. What about my skill?"

  He tried to put some points into his skill, and immediately words appeared in front of him.

  [Insufficient Sin Points: -900]

  He slightly widened his eyes upon seeing that number. He didn't know whether it was a lot or not, but a thousand seemed a bit much to increase his skill by one level.

  He focused on his skill that he tried to increase the level.

  [Enhanced Strength: I]

  [Increase the user's strength by 20%.]

  Seem just ordinary skill, but it is in percentage so it is going to be useful to him in the future, and if he upgrades it to the next level and gets a lot of percentage, then it makes sense to be expensive.

  He then tried to increase his level with Sin Point.

  [Increase your level by 1, cost: 10 points]

  [Yes] / [No]

  He looked at the cost in surprise, seeing how cheap it was. He thought for a moment before he focused on [Yes].

  He felt something warm flowing through his entire body; he could feel his muscles strengthening, his bones hardening, and his blood flowing faster.

  Enjoying the euphoria he got from being strengthened, he looked toward his stats to see that they all increased by two points.

  He immediately used his points again to increase his level, and this time it cost twenty points, but he still used it to increase his level.

  He then used all his points and looked toward his stats in satisfaction.

  [Sinful System]

  Name: Ryou Akuma

  Race: Devil

  Level: 5

  Sin Point: 0

  Stats:

  Demonic Power: 18 (450/450)

  Strength: 13

  Endurance: 13

  Speed: 13

  Intelligence: 13

  Racial Skill:

  [Enhanced Sense: I] [Enhanced Strength: I] [Enhanced Endurance: I] [Night Vision] [Fly] [All Language] [Light Weakness: V] [Holy Weakness: V]

  Inventory:

  - Chaos Orb (1)

  - Evil Piece (8)

  Satisfied with his body that had grown stronger than before, he then looked toward his inventory and focused on the item he was curious about.

  [Chaos Orb]

  [You can get anything random from it, like abilities, equipment, and items. There is no limit to what you can get.]

  He gulped his saliva, feeling slightly excited and nervous from seeing the description of the item. There is a possibility that he might get an ability like Infinity or Almighty if he is lucky, but if he is not, he might just get something mundane or totally useless.

  He hesitated about whether he should use the item or not, but he decided to use it; sooner or ter, he would use the item anyway.

  With a bit of apprehension and expectation, he used the Chaos Orb. There was nothing special that happened when he used the item; the orb just popped out and let out a crystalline key with rainbow colors into his inventory.

  [World Teleportation Key (1) acquired]

  "World Teleportation Key?"

  He tilted his head in confusion and began to read the item description.

  [World Teleportation Key (1)]

  [One-time use item that lets you teleport to any world you want and stay in that world for one month; time stops in your original world.]

  He looked at the item complicatedly. The ability to teleport to any world he wanted was certainly powerful, but he could only stay in that world for one month. He would need to think carefully and choose the world he visited to get the biggest amount of benefit he could as much as possible.

  He thought about a lot of worlds he could visit that would make him stronger in one month ti—

  "Ryou!"

  "Ah! Yes!"

  He flinched and snapped out of his imagination when he heard someone say his name loudly. He looked toward the source only to find Shizuka Hiratsuka gring at him, and he gulped his saliva in fear.

  He looked at her ferocious face with nervousness; after all, Hiratsuka is famous for punishing her naughty students. Even Takashi, who usually rarely comes to css, is present right now. He doesn't want to get punished, although he wouldn't mind it if she did it in bed...

  After staring at each other for a moment, Hiratsuka's angry face slowly softened, and she let out a long sigh.

  "I know you just lost your parents recently, and it must be hard for you, but can you focus on my lesson?"

  "Yes... I am sorry that I was lost in thought, Hiratsuka-sensei."

  "Good, just don't do that again."

  Hiratsuka nodded in satisfaction and went back to continue her lesson. He breathed a sigh of relief; he ignored the pity in his cssmates' eyes and turned to his right to see Rei Miyamoto staring at him with concern.

  "You alright, Ryou?"

  Rei whispered while her red eyes showed concern for him. He smiled lightly toward his girlfriend to show that he was alright. When he was taking care of his parents' funeral, Rei was the one who always comforted him, so he had feelings for her despite dating for a short time.

  "Yeah, I am fine, just thinking about a lot of things."

  The concern in her eyes, instead of alleviating, in fact became stronger. He immediately grasped her hand with his to assuage her worry while smiling gently.

  It is surprising that he has a girlfriend, not to mention a pretty girl like Rei.

  This happened because he protected her from Koichi Shido, who held her grade back to humiliate her. He thought that it was kind of shallow for her to date him just because of that, but in the end, he accepted her as his girlfriend because she is a beautiful girl, which is also a shallow reason.

  It might also be possible that the reason his parents are dead is because of him protecting Rei. He should inform Sona and ask her to investigate whether Koichi is the one who murdered his parents. If that is indeed the case, he is going to torture him before killing him in cold blood.

  He hatefully thought in anger while still wearing a gentle smile toward Rei.

  [Sin Point: +50]

  He widened his eyes slightly when he got that notification, but he ignored it in favor of comforting Rei.

  "If that's the case, then alright."

  Seeing her smiling again, he feel relieved and released her hand, and he could see that there was disappointment on her face when he do that. While he also felt disappointed, he couldn't do that when Hiratsuka turned toward their general direction.

  He then noticed the prickling sensation on his skin. He turned to where it was coming from and saw Takashi staring hatefully at him. Takashi immediately turned his face away when he looked at him.

  He ignored it and focused on the lesson. Even if Takashi had a crush on Rei, there was nothing he could do since she was already his girlfriend. The only thing he worried about was a zombie outbreak because of his existence, but even if that happened, he should be fine surviving in a zombie apocalypse. Besides, there are a lot of supernatural beings in this world; there is no way they would let mere zombies destroy the Earth.

  Not to mention he has a system that can make him stronger by doing sinful things, he would make sure to do a lot of lewd things toward Rei ter, and he also remembers that there are a lot of girls that come from other anime in this school. He smiled greedily and he can't wait to conquer all of them.

  ◇ ◇ ◇

  "Hey Ryou, how are you, dude?"

  When the school break begins, Issei approaches him with concern, followed by Matsuda and Motohama. He smiled; even though he is not that close to the trio, he still feels happy for their concern. But then he frowned when he heard what Motohama said.

  "It must be hard to lose your parents. How about I lend you my special DVD for you to watch ter?"

  "Oh! That's a good idea! How about I lend some of my special collection? It will be good, I promise!"

  "In that case, I’ll lend you some; you can use it to relieve your sorrow."

  Issei and Matsuda chimed in to provide their supposed help. He bnkly looked at them with a twitching mouth as they talked to each other about which porn they were going to lend. He could see that the surrounding girls looked at them with disgust while the boys just sighed, likely getting used to their behavior.

  "Hey, you three, don't infect Ryou-kun with your dirty mind, or I am going to beat you."

  "That's right, that's right. It seems you three have not yet learned the lesson after we beat you guys yesterday."

  The trio immediately shut up and backed down with cold sweat when Murayama and Katase approached them. Compared to the original, they looked sharper and more skilled. He heard that after Saeko Busujima became the kendo club president, she gave the club members hard training.

  "Nngh! This is only thing a man can understand! Girls shouldn't interfere!"

  Issei bravely confronts Murayama and Katase with passion, despite the fear in his eyes. Likely encouraged by Issei, Matsuda and Motohama voice their support for Issei from behind.

  "That's right! Get out of here! You two have no business with talk between boys!"

  "Yeah! This is something to make Ryou excited about life again!"

  His eyebrow twitched; hearing what Matsuda said, he felt like he was going to become more depressed if he watched the porn they gave him.

  "Hooh, you three really are brave. It seems we need to teach another lesson."

  "Might as well crush their manhood so they can be normal again."

  """Hiiih!!"""

  Murayama and Katase narrowed their eyes, and the trio flinched and hugged each other while trembling pathetically.

  He sighed, having had enough of their comedy. He raised himself from his seat while grabbing Rei's hand with him and then dragged her out of the cssroom.

  "R-Ryou?"

  "I have something to talk to you about. Let's go somewhere quiet."

  He looked back toward her with a smile, and she turned away from him while blushing.

  While he is not the most handsome, he is pretty confident that he is high in rank in terms of appearance in this school.

  "Wait, Ryou! Where are you going? Please save us!"

  When he was near the door out of the cssroom, he stopped. He turned toward the pervert trio with a smirk, then put his hand around Rei's shoulder and stuck his cheek against hers, making her yelp in surprise.

  "I am sorry, you three, why would I be satisfied with porn when I can do it with the real one?"

  Rei blushed and fidgeted in his arms, while the pervert trio let out shocked and betrayed expressions. Their faces then turned to anger, and they yelled at him.

  "You bastard!"

  "Our concern is wasted on you!"

  "Just go die and explode!"

  "Ha-ha-ha-ha-ha-ha!"

  He cheerfully ughed while turning around and brought the blushing Rei out of the cssroom, ignoring their futile curses and compints.