The 27-year-old, Formerly known as Masamune Saga, before his parents divorced in high school and his mother remarried.
He is the editor-in-chief of the Emerald department at Marukawa, and is sometimes referred to as "the capable". He and Ritsu were once in a brief relationship in high school but split up over a misunderstanding, where they both thought each other was wrong.
It is revealed that he later had a breakdown from the break-up, family problems, and other personal issues, which in turn left him with unresolved feelings for Ritsu. When both he and Ritsu realize who each other are, he promises Ritsu he will make him fall in love with him again, much to Ritsu's contempt.
In Sekai Ichi Hatsukoi: Takano Masamune no Baai (lit. Masamune Takano's Case), the reader sees Takano's perspective on his and Ritsu's first meeting and romantic development.