Looking for a manga

The start of the manga involves these brothers (might be step idk) and one's been coming home late/been on the phone. The other brother thinks he has a gf. The brother brings home this little kid (platonic seeming)and the other brother gets jealous and offers to take the kid home. He tries to kiss the kid but realizes that's not a good idea and stops. He finishes driving the kid home and meets the kid's brother. He falls for the brother after a little while.