Yowaki na Kimi to Nagai Shiawase(2023)

Yowaki na Kimi to Nagai Shiawase

University student Tsukino Ryou was wondering if he likes men. Wanting to take a step forward, he applies to join a gay sex group called "Polaris," but the moment he's about to go to a hotel with one of the group members, he gets scared. Suddenly, a familiar handsome man named Shinji, who’s also a part of the group, appears in front of Ryou and tells him not to come back to this place and go home.
Ryou is relieved that he didn't have to have sex with a complete stranger. However, the next day, he discovers that Shinji is his senior at the same university. He tries to thank Shinji for saving his life, but...

(Source: Ichijinsha, translated)

Note: Includes an extra chapter.