Dekichatta Danshi
Ongoing | mikage tsubaki | 2008 released
Nice story but I'm generally not a fan of yaoi with young kids in them (especially boys that are past the infant stage). From all the stories I've read at least 98% of the time the kid falls in love with one of the "parents". Then they seem to do their best to cock block so their parents can't spend time alone or wait until their fighting and do their best to come between them so they break up. Granted they usually find some love interest of their own later if the story progresses that far, but it's still annoying.
Wasuretai Itoshijin