[Volleyball Boy] Brother Control Simulator

1. Question: What should I do if I wake up and find that I have traveled through time? Answer: (expletive) Why are you dressed as twins, and what is this garbage system? Mission objectives: Unlock your skill points: 0/100 Prevent disaster for your brother: 0/? Protect yourself like a jade for your brother: 0/1 Sakuhaya Seiya:...... Is there anything wrong with you? What the hell is protecting your body like a jade for your brother? Is it possible that I will eventually fall in love with my twin? The system has no choice but to show its hands: after all, this is a brother control simulator. 2. How does it feel to wake up and find that your twin has disappeared from this world? Sakuzao Seomi: Thank you for the invitation, it was a shock. One day, his twin suddenly gritted his teeth and said something incomprehensible to himself. "Goodbye, my difficult 'brother'." After she finished speaking, she fainted and woke up the next morning, with him in her bed. I didn't feel any different at first. Half an hour later, he found that all Sakuza Seiya's things had disappeared from the house without exception. Sakuza Seomi called Komori and the other party asked him who Seomi was. When he called his parents, he got the same answer. No one except him remembered Sakuhaya Seiya. It was as if he never had that twin sister from beginning to end. The original daily comic turned into a thriller and suspense comic because of such an incident. It wasn't until after joining BJ that a few days before Hinata Shoyo's first game against AD after his return, his teammate took a magazine and pointed at the long curly haired girl with blue highlights and discussed it enthusiastically, saying that this person's face looked similar to Kotomi. Sakuzao Shengchen came over and was stunned when he saw it, and almost crushed the cup in his hand. *Contains brother-sister relationship *The timeline is messy, please differentiate carefully. *I don't know yet whether they will fall in love, so I'll leave it as no CP for now, but there will still be ambiguity (click your finger) ＊Thanks to my good friend @MUhuai for the cover Intention: No intention yet