Hyung is in the House

17 ch + side story
(if I were mature it would be 5 stars)
Older uke and puppy seme were childhood friends turned lovers. They were together for a crazy long time, grew apart, and broke up. The seme has some kind of time traveling fiasco and reverts to his younger self in the current timeline.

This story was good but it hurt my heart. Time travelling aside, the relationship issues were far too real.