Transmigrated Into Blue Lock, but With a Haikyuu!! Plot

[Content warning: This story has a very, very, very large amount of ship-teasing. Mimi will have extremely intense, twisted, gravity-defying mutual attraction with other characters (at least one).] Mizusawa Yuu accidentally binds himself to a volleyball story check-in System. As long as he completes the volleyball story check-ins, he can earn generous rewards. To that end, he gritted his teeth and accepted the System's demonic training. But one day, the System told him that he wasn't about to take the court at the Spring High tournament. He was going to prison: Blue Lock. And he'd have to act out Haikyuu!!'s story while inside the prison. Haikyuu!!, but with soccer. ...Seriously? Do I have to do this? [Extra Scene] "Whether a goal is scored or not isn't one person's fault. Everyone on the field is connected." Teammate: "...So that's how you knew where to steal the ball from me?!" "If there isn't a 100 percent chance of scoring, I won't pass to you, loser." Teammate: "Huh?!" "By the way, you look pretty irritable on the field, but your passes are so sweet and well-behaved ^_^." Opponent: "...I'll kill you!!!" Everyone else: This guy! How! Is! He! A! Team Player?! "The Player Knows a Thing or Two About People" The player discovered a new game. [Want to experience a different life? Want to feel the fire of youth and the bittersweetness of romance? Come play Become the Protagonist! and start your second life!] But the player only cared about grinding levels. Middle School Side Story: Basketball Club [Your blue-haired companion is worried about the recent changes in the Generation of Miracles. You decide to...] Player: Beat one of them for 5,000 EXP. Fight! Fight! High School Side Story: Volleyball Club [Your setter hopes you'll fit in with the team and stop stealing the ball from your teammates. You decide to...] Player: Successful spike, 500 EXP. Fight! Fight! Professional Side Story: BLUE LOCK [Your teammate hopes you'll work with him to score and win through teamwork. You decide to...] Player: Goal, 500 EXP. Fight! Fight! Teamwork? Sorry, the player refuses to share experience with low-level characters. [You have completed the game.] [Your story viewing rate is below 10%, and your NPC interaction rate is below 20%.] [Congratulations on earning the hidden achievement: Knows a Thing or Two About People] Theme: As long as you work hard, you can grow stronger