Comic Party Wonder Love vol. 3 (Yaoi manga)

When Raizo’s sister, Rina, suddenly shows up at their door, Raizo resolves to tell her about his new “roommate,” but Shinobu’s well-intentioned antics get in the way. Introducing your big sister to your boyfriend is no small thing, even if she is a BL manga fan…! Meanwhile, Shinobu struggles to adapt to living with his rich, successful boyfriend…

After all, how is a garbage larva like him supposed to contribute to their new home life?