Tsukiatte Nainoni Fuufu Yattemasu

Tsukiatte Nainoni Fuufu Yattemasu Manga :

"I should only stay as Ryuu's friend."
Amakasu Kiichi is a gay man and it's been 3 years since he started living with his straight best friend, Shibata Ryuunosuke, while raising the latter's niece, Mako together.
Even though he sometimes has trouble balancing childrearing and work, Kiichi still managed to build a family-like relationship. But there is one thing that he's been hiding and that is his yearslong unrequited love for Ryuu.
To make sure that Mako has a happy childhood, Kiichi had planned to keep his feelings hidden forever but one drunken night, he ended up being held by Ryuu!?
This a heartrending story about a painful unrequited love and family bonds.