From Muses Scans:

Clothing designer Yuuki; cool and mature company president whom he met online, Hasegawa; and a frugal university student, Makabe. Hoping to start a communal life together! Both men unconsciously thrown into a home wafting with pheromones!
Older vs Younger x a little devil’s love triangle!
A room sharing romcom filled with exciting and passionate happenings.