Haikyuu!!: Rolled Into a Full-level Main Attack by My Brother

[No CP + Everyone's Passionate + Matches/Daily Activities + Twin Bonds] Good news: The King of Rolls system awakens at the start. Bad news: The target of your roll is your genius younger brother. "What a waste of time!" Reincarnated as the twin brother of a volleyball family, Yuuma Kisawa has lived in his brother's shadow since childhood. The system demands that his stats, from spiking to blocking to serving... all must surpass his younger brother, Yugi, in order to level up. But his twin brother is a hexagonal monster who can use a "banana" as a basic attack. His serves are accurate to the centimeter, and his receiving, passing, and blocking are all impeccable. Not only that, he's a volleyball fanatic who spends all his free time practicing! He can't roll, he can't roll. Yuuma's face is grim: "Do you think I'll just give up? No! I'll die on the volleyball court!" Thus begins the brothers' love-hate volleyball routine. #Other brothers are orthopedic surgeons, this brother is an orthopedic surgeon in reserve# ... Supplement: The Ji Ze brothers are the same age as Hinata Kageyama, and will attend Aoba Johsai in high school (because of the author's selfish desire, I hope that Oikawa Toru will have the opportunity to enter the national level). The important plots in the original work will be preserved as much as possible (the garbage dump showdown will be there). The Ji Ze brothers are very capable, winning more games than losing. After high school, they will focus on consolidating their basics and improving their skills/physical fitness. Main characters: Ji Ze Yuma, Ji Ze Yuji