[Comprehensive] Ex-Boyfriends

Shirasaki Yuma, who was a teacher at a high school, was suddenly selected by the unheard-of Sword of Damocles for no apparent reason and became the new Colorless King. The memories of his past life gradually recovered. What's even weirder is that as the worlds he lives in begin to merge, his ex-boyfriends also come to find him. Purpose: Be loyal to your heart and live your life seriously