Ancient Sailor's manga / #brother's replacement(1)

Ch.1-4: Without a house, Kaname's new boss Shinobu offers to let Kaname stay with him, the only condition is that Kaname acts as his brother, since he reminds Shinobu of his deceased brother. As Kaname's feelings for Shinobu grow, the more painful it is to act as a replacement Ch.5-6: Akira has realized Sousuke, his rich childhood friend he'd always thought of as a younger brother, has feelings for him. Akira was going to ignore it, but Sousuke suddenly pushed him down and confesses