Kataomoi

Sports writer Nishiwaki Tetsuro got married to Risako, who was the manager of the American football club to which he belonged as a university student, but they are not on good terms.
One day, Nishiwaki is on the way home after a reunion with American football club teammates, including Hayata Yukihiro and Sugai Makoto. He and Sugai sneak into the university grounds and run into Hiura Mizuki, who was a former manager of the club. He radiates a strange aura. Then he makes a shocking confession to them, “I killed a person.” In addition, at Nishiwaki’s house, Mizuki reveals to Nishiwaki, Sugai and Risako that he has gender dysphoria and is living as a man. He worked at a club as a bartender and killed a customer who was stalking a hostess Saeki Kaori at an unseen place.
At first, the three of them feel disturbed and at a loss for words. But together with Nakao Kosuke, another teammate who was also Mizuki’s ex-boyfriend, they make the decision to protect their brilliant youth and friend. Then Mizuki goes missing. In the course of searching for him, Nishiwaki has faced a series of distressing facts. What decision will Mizuki and the team members reach?
(Source: DramaWiki)
~~ Adapted from the novel "Kataomoi" by Higashino Keigo.