I have the feeling that Ayumi is Araki's one night stand and although I feel like if Kotaro finds out it will obviously affect him I don't think Ayumi should be blamed he never denied his past (plus I don't think he'll actually remember sleeping with Araki) and when he confessed to Kotaro he told him he had never fallen in love he just had a bunch of one night stands and Kotaro accepted that and chose to stay now of course learning he personally knows one of his one night stands is going to hurt Kotaro but my babies will work it out like they've work out everything so far (⌒▽⌒)
I have the feeling that Ayumi is Araki's one night stand and although I feel like if Kotaro finds out it will obviously affect him I don't think Ayumi should be blamed he never denied his past (plus I don't think he'll actually remember sleeping with Araki) and when he confessed to Kotaro he told him he had never fallen in love he just had a bunch of one night stands and Kotaro accepted that and chose to stay now of course learning he personally knows one of his one night stands is going to hurt Kotaro but my babies will work it out like they've work out everything so far (⌒▽⌒)