Did This Natural-Born Jerk Do Something Wrong by Falling into a Haikyuu!! Anime?

Yasaki Toki promised his little sister he’d unlock every ending in a volleyball otome game, but then the plot started to go off the rails. The kind of off the rails where you catch someone getting frisky with another person in the club room and they ask if you want to join in. Just as he’s about to reload and start over, he transmigrates into a hot-blooded sports anime… He may be hopeless at sports, but when he hears the team shouting, “One more ball!”, Yasaki Toki still agrees to become the team manager. Karasuno’s volleyball team will no longer be crows unable to fly! As they spend time together, the team members all seem to awaken some strange memories. Yasaki Toki: Help! - Reader’s guide 1. OOC warning; some details are my own additions. 2. Toki is naturally a little shit (emphasis added), and the romance gets messy. 3. The protagonist is doted on by the whole cast and is universally adored. He has poor stamina but a sharp mind. 4. This is a self-indulgent work I wrote for myself. 5. Comments on individual chapters are enabled. Theme: What you love will find its way to you