I just don't understand why Nana didn't say she was in love with Rin from the beginning. Hell, it would have been an actual twist on the side-character-confessed-to-the-protag trope. Making it a double-twist was completely unecessary.
I feel like there are some manga like this. It starts off dubiously, where it gains a large number of 1-star reviews that drag it down even as it improves.
This chapter certainly makes me feel... a certain way. It's so fucked up because of the effect he's having on Kirishima, and yet it almost fools you into believing it's wholesome right up to the end because he doesn't visibly have malicious intent.