Soredemo Ashita mo Kareshi ga Iiそれでも明日も彼氏がいい; Even So, I Still Want to be Your Boyfriend Tomorrow; Dẫu vậy, ngày mai anh vẫn muốn là bạn trai em

Kouhei and Mako are a couple in love. However, Kouhei is worried because Mako is very unwilling when it comes to having sex with him. On one such day, he hears a proposal from Mako: how about partner swapping sex with another couple?