Tsumugi and I have been dating since our college days and are now living together with the intention of getting married. She's cute She's kind, and I'd be extremely happy if I could marry her. ...But before she knew it... she was with that guy, of all people! With her best friend, Tsukasa! Who would have thought something like that had happened... Recently, I've been seeing a lot of "cuckold" and "NTR" stuff on the internet, but I thought those things had nothing to do with me... It's itchy and frustrating, but... a depressed, erect cuckold story that starts with a blowjob that gets me excited for some reason.