I'm looking for this bl manga about caregiver I think?

It's about younger guy taking guy of this older dude (his middle not really a old man) in his apartment. But the younger guy a crush of this older dude before but because of their age the younger guy never confessed, but soon they're in relationships but drama started, soon the older dude travel away without the younger guy knowledge to the younger dude parents to ask for blessing of their relationship