Not a Player, but the Sea Emperor

[Everyone Thinks I'm an Innocent Younger Brother, But Actually All of Japan Is My Pond]

Chuya in this world was very troubled. He'd been having a perfectly friendly exchange with the other side when, halfway through the fight, he received the world's malice: memories from ten trillion alternate selves. And so Chuya, who had been a fine, upstanding young man, went astray halfway through...

Theme: To be clear, I'm not a playboy.