Tsumugi-kun no Sakippo

Tsumugi and Kosei have had a secret habit since they were little. That is.. to let Mitsumugi's tits be sucked by Kosei. At first, I wanted to comfort him. At first it was just to comfort him. But as puberty hits, the relationship changes more and more.. A love story between an arrogant sergeant and a childhood friend with no relatives.