 If you liked
Koinegau Orizzonte
|
 ...then you might like
Hitori to Hitori no 3650-nichi
|
Quite similar themes. Both manga feature an uke who's haunted by his past and hasn't forgiven himself. He wronged the seme, who he meets years later as an adult, wanting him (the seme) to punish him (the uke) via sex. Of course, the seme is a complete fluffball who does nothing but love and respect the uke!