Nidome No Koi (Hidaka Shoko)

(adapted from cottonholic on nihonomaru): Fujiwara is a man of unusual tastes—he finds plain-looking, borderline unattractive men appealing. And Karahashi, his lover and middle school teammate, has started to be insecure about this. What will he do to keep Fujiwara’s attention? Continuation of chapter 4 of Shiranai Kao (Fujiwara meets his old classmate Karahashi again after several years. But Karahashi's appearance has completely changed!)