Sudden Death
Hanabita Ayumu had always loved playing visual novel games, particularly ones aimed for Omegas where he got to play as a pretty Omega character.
He had always felt like an Omega stuck in an Alpha's body, and could relate to these dating sim characters more. While at the same time, envying them and looking up to them.
How beautiful and delicate they were, how all they always caught the attention of all the Alpha men they encountered.
When he was in his 3rd year of high school, he was obsessed with this game called Sudden Death that was much more wholesome than it sounds.
It was a South Korean dating sim where you get to pick a character from a famous Alpha K-pop group called BMayn. The company of this group itself approves it, and the game work as a message and call game.
For 365 days, people can play Sudden Death, or 'SD' as it was called, to feel like they were having an online relationship with their idols.