it's more complicated story than "horny dense mc thinks that she is friendly to him but both fall for each other in the begining and hide it". Kinda spoilerish but not preciseIs this when they realize they like each other or we have the Japanese protag moment where the guy realizes the girl likes him?
Amane is't dense (maybe has some moments like everyone) he has his problems same as Mahiru, story is more like showing their feeling slowly growing and how they help each oter to overcome their past.