Shimanami Tasogare

Shimanami Tasogare (しまなみ誰そ彼) is a manga by Yuhki Kamatani. It began its serialization March 6, 2015 and ended May 23, 2018. It has four volumes total. Seven Seas has licensed it for release in English.

Plot
Not only is high schooler Tasuku Kaname the new kid in town, he’s also terrified that he’s been outed as gay. Just as he’s contemplating doing the unthinkable, Tasuku meets a mysterious woman who leads him to a group of people dealing with problems not so different from his own.