[Prince of Tennis] The Rise of Rikkai Dai

Who would have guessed? The first one to have his cover blown wasn't the single-celled kelp, but the strategist, famed for his meticulous attention to detail. Every regular on Rikkai Dai stared at the terrifying secret training menu in their hands, which was clearly straight out of U-17, while a thousand, ten thousand frantic comments flooded their minds. Renji! Strategist! Senpai! Get a grip! We're only in our second or first year of middle school, our little bodies can't take this! You're rushing things and ruining us! Aaaaaah!

Yanagi Renji: No. Believe in yourselves. You can take it.

Also known as Rikkai Dai: Everyone's a Villain. The entire cast is reborn, told mainly from Yanagi Renji's point of view. No romance. Daily life plus plot. Friendship-focused. Lighthearted, satisfying fluff.