I can honestly understand Aka's decision to retire at this moment, he's still relatively young, Kaguya probably made him enough money to live off of, and the life of a mangaka is hell. Alongside that, anything he writes after this is only going to be compared to, and worse than, Kaguya, since he decided to lead off his career with what will end up being a generational romcom, probably still being read 20 years from now. And even though I wish he had written more, I hope he also gets the happy rest of his life his characters got.