Y'all calling mc weird clearly didn't read past the first few chapters where his true feel...

Y'all calling mc weird clearly didn't read past the first few chapters where his true feelings are explained. When ml was born, mc only wanted to protect him as a guardian so he could live a peaceful life and grow old. He never planned on romance until ml reached out years later fully grown looking like his past self, which brought all those memories back. And at graduation when mc took the photo of ml and his girlfriend? He was hurt because it hit him that ml was finally living the normal human life he always wished for him. It was bittersweet because it meant ml was moving on, and mc had to accept that his past lover truly wasn't "his" in this lifetime anymore.