HELP!! Can not remember title.

yaoi manga pretty sure it’s an oneshot, about how the one boyfriend (seem) has to watch some kids instead of date (i think the were at a park by water) and the other boyfriend (looks like a seme but is a uke) he hates the idea, and even get its in a fight with one of the kids, whom are both jealous of each other. The kid soon apologizes and explains it’s all his fault. I remember everything, but the title. Would really appreciate it if anyone can help me out. Thanks :)