The fact that the MC is imagining Hayamine giving him a titjob, and making his P so happy that even smiles lmao.
An MC who likes naizuri is so rare....
Even though Hayamine's tsun side is irritating, the fact that the MC likes a flat-chested woman and even says so openly is so refreshing. I'm tired of MCs rejecting advances from flat ones or simply not feeling anything for them as if they weren't even women.