Tasuku is secretly in love with his childhood best friend, Ryouta. One day he finds out that he might be the child of the "luck goddess" and that by sleeping with him people might get lucky. He uses that excuse to finally confess to Ryouta, that if he's lucky then being in a relationship with him would be worth while to Ryouta. Poor Ryouta doesn't care much about being lucky, though, and is just struggling to realize what his feelings for Tasuku might be. Cute story!
Bokutachi Wa Asu Ni Mukatte Ikiru No Da