From the Demon Slayer Corps to Rikkai University's Tennis Club

[Going premium on Tuesday~ (waves handkerchief) Please show your support, dear readers~ (ov< ~wink☆)] Ise Shuuma's life was simple, yet extraordinary. Originally a well-behaved student in the 21st century, he accidentally transmigrated a hundred years into the past, learned Breathing Techniques, joined the Demon Slayer Corps, and fought demons. Later, after encountering the Demon King and being turned into a demon, he willingly embraced his fate. Then, after resting peacefully for a long time, he was dug up from underground by a construction crew. And was stunned to discover he'd returned to the modern era. Kirihara Akaya noticed that the kid next door had changed completely after just a few days away. He was all wrapped up, acting suspiciously as he investigated some demon-slaying organization. He wore a mask every day, and later even took to wearing an eyepatch over one eye. He carried an umbrella whenever he went out in the daytime, rain or shine, and had turned into a taciturn, cool guy! “You've been gone for one spring break, and now, ” Kirihara Akaya met his slightly tense gaze. “Have you awakened your chuunibyou?” “...” (Demon) That's not all. He'd gotten super strong, too! So it's true that turning evil makes you three times stronger! Ise Shuuma: . His childhood friend, who used to beat him at tennis every time, can now take on the Big Three by himself. Can you believe it? He's more afraid of sunlight than Niou Masaharu, better at kendo than the vice-captain, loves sleeping even more than Jiroh next door, and is stronger than that samurai, Echizen Nanjirou! The seaweed-headed delinquent with the mean mug: “Now you can finally understand how I feel!” Ise Shuuma: “No (smiles). Put your white hair and red eyes away. You look more like a demon than I do now.” This year, Seigaku has an outrageously talented first-year regular who appeared out of nowhere. Rikkai's team: What a coincidence. So do we. >>> 1. Mainly a crossover between Demon Slayer and The Prince of Tennis, with some Detective Conan (not involving its main storyline). 2. Rikkai wins its third consecutive championship. The protagonist is terrifyingly strong. 3. He has a Blood Demon Art, but can't use it in the early story. In the bonus chapters, he turns human again. P.S. The author will update “N Things About Ise” in the author's notes from time to time. If you don't like author's notes, no worries. Once the main story is done, they'll be compiled into bonus chapters. Screenshot saved on 9/28. Here's a preview of another upcoming story: Rikkai Academy Campus Simulator Shoji Yuma plays a highly customizable school-life simulation game to get used to the unfamiliar life awaiting him in Tokyo. His cousin says he's got the whole of Hyotei covered, so there's nothing to worry about. The game is pretty fun. You can farm (grow vegetables in the school flowerbeds), run a business (set up a stall outside the school), and explore an entire city beyond the school grounds. If you're looking for a thrill, you can even equip a rocket launcher and go mess around at the local gangs or police station. The game has an affection system. Shoji spends his days raising affection, doing club activities, and having a great time. >>> One day, Kirihara Akaya rushed into the tennis club in a panic. “What do I do? I got a love letter from Shoji-senpai!” Yukimura Seiichi (smiling): “...” Don't be mad. He's not mad. Sanada Genichiro suddenly froze. Yanagi Renji glanced at him. “Actually... I got one too.” Niou Masaharu shrugged. “Puri, I've gotten three in all, plus heart-shaped cakes and chocolates and stuff. What about you guys?” Marui Bunta wiped the bubble gum off his nose and let out a long breath. “...So I'm not the only one. I've been holding this in for ages. I didn't dare say anything!” Jackal Kuwahara: “! ...Ahem... Me too.” Yagyuu Hiroshi: “...” Kirihara Akaya checked the date, realized he was the newest crush, and scratched his head. “D-do I say yes?” Yukimura Seiichi: “.” Aside from his strange (emphasis on strange) behavior and habit of sending love letters to his teammates for no reason, this new Rikkai regular is actually pretty popular. “Shoji-senpai is handsome, kind, and considerate... and he's really good at tennis, too!” The seaweed head blushed and fidgeted with his fingers. Marui Bunta (horrified): “...” Look behind you at the captain, who's smiling like an absolute psycho! Anyway, everyone agrees on this: Shoji may be a little strange, but he always notices when people are struggling and lends a hand. He's a good person! >>> Until one day, they watched him fly low over the school entrance with a jetpack. Behind him came a huge, heavily armed crowd. “Don't let that bastard who robbed our armory get away again!!!” Rikkai's team: “...Wow!” >>> He started dating his in-game desk mate. It was only a paper character, but somehow he was completely smitten! He was in the throes of romance when, on his way home from the airport, he discovered the app had suddenly disappeared! After moping for a while, his cousin dragged him along to a friendly match against another school. “There's a player on their team who looks almost exactly like you!” Atobe Keigo didn't see another familiar face on the team. “That monkey called Manshan... ahem, where's the most popular one?” He didn't notice the boy beside him stiffen the moment he heard his online handle. The Rikkai team's reaction was just as intense. Yukimura Seiichi smiled beautifully. “Isn't he right beside you?” “Come here, Yuma.” “...!!!” Shoji Yuma remembered the punishment scenarios he'd triggered a few times. Shoji Yuma decided to play dead. Theme: Carrying forward the future entrusted to us by those who have passed away