Yamome no Tamagoやもめのたまご; 特殊的爱人关系

From Girls’ Generation Scanlations: After being abandoned by his lover (male), Motomi vowed to become an artist and was brought home by Yoruno Koji, the artist he admires. That night while resting in Koji’s room, Motomi accidentally saw what was going on in his neighbor’s house through the window, and unexpectedly it evoked uncontrollable excitement and lust...?! This is Akahoshi Jake’s debut work.