Idk about you guys, but in this case, I do think Kazuya is right with telling the grandma the truth. But hey, we have chizuru whose main reasoning is..... that she loves him and his connection through her is through the rental service and the grandmas, mainly the renting so if they break up then gg no re for her. So yea, she's being selfish with that request and not actually thinking about her grandmother, she's just framing it that way. Ruka is a little different this chapter actually caring for chizuru. She's still a bitch tho, blackmailing him into a relationship which, if the first half of this comment being Kazuya doing the right thing happened, she'd have nothing over him and he doesn't love her so she'd also be gg no re. Its almost like telling the truth is a simple solution that would fix every single problem he has and everyone around him is being somewhat selfish about it now that he's stopped being an idiot about it hmmmmmmmmmmmm. That's all.