We're Childhood Friends but I Like Him in That Way.

Osananajimi dakedo Seiteki ni Suki desu.
幼馴染だけど性的に好きです。

Sequel

manga

Kazuma and Yuuya are stepbrothers who are actually lovers and live under one roof (in their parents' house), secretly doing the things lovers do under their parents' radar. A particular close call is intercepted by Kazuma's quick-thinking. While Yuuya is determined to keep their relationship under wraps, he also begins to feel anxious and conflicted for how long they can keep it a secret. On the other hand, Kazuma meets Yuuya's student, Matsubara, from his part-time as a cram school tutor by chance when they're out shopping. Seeing their closeness, Kazuma's instincts tells him that he should keep an eye out for him. He is also curious how Yuuya is doing at the cram school, with Yuuya having a charm that attracts those younger than him... (Source: Takeshobo, translated) *Note: Includes one extra chapter.*

Spin-off

manga

The recent concerns of our straight-laced university student Fujie lies with the man who is too buddy-buddy with his best friend Yoshida. On top of appearing flashy and frivolous, said man, Ooshima Haruki, has rumors floating about him that he's gay. And coupled with the fact that he's so close with Yoshida, now there's even rumors that they're dating... Even though that guy is not worthy of Yoshida!! He informs the two of the rumors about them, and receives a hearty laugh as a response. The two deny the rumors, and Fujie learns that Yoshida had received love advice from Ooshima in the past. He's shocked by the fact that Yoshida asked someone else, and not him. When he expresses his distaste for Ooshima and treats him coldly, for some reason Ooshima interacts with him more than necessary. What's more, when Fujie is feeling low, he steals his first kiss...!! A flirtatious guy who's keen on physical intimacy x A straight-laced, serious bespectacled guy The two from extreme opposites inch closer together: a dawdling, gradual love ★ (Source: Takeshobo, translated)