リバーシブルDIY / 巨工場

Note: This work features a couple that switches roles.

Beniya (cover, left) is a gay man, while Itaroku (cover, right) is supposedly straight. They had sex once during college, anc being thoughtful of Itaroku, Beniya took the role of the bottom.
Over ten year later, the two meet again at a hardware store as staff and customer and exchange numbers. This time, Beniya is determined to top Itaroku, but...

This story is about two tops trying to out-top each other.
The characters flip-flop roles constantly, to the point where you'll be wondering when their fight to the top will end!