Koko Wa Yasashii Niwa

Koko wa Yasashii Niwa manga summary: Kaoru is a guy who hates to work hard in vain since childhood because he couldn’t get his mother’s love no matter how hard he tried.
One day, a strange guy appears and identifies himself himself as his “brother”. Because that man was wounded, Kaoru let him stay for the time being, but what will this event develop itself into?