Yajima's possessiveness comes from his insecurity I believe. Both of them are so possessive of each other but they don't harm anyone so Ig that's okay.
And their sexual compability is off charts lol and how Yajima makes him meal to keep up his stamina, lol.
oh idk the title because there's no English translation and there's no raw version on any illegal site. I know there's a side story because mangaka post it on twitter
This is heaven so wholesome.