please help me find this series

hello, as the title suggests, im looking for a series
i cant remember much of it, but im fairly sure it was a bl manhwa
the only thing i really remember from it is a flashback where mc and ml (i think hes the ml, im honestly not entirely sure) are kids and theyre at the mls house
im also fairly certain that the ml is considered rich? idk
anyway the mc breaks some expensive plate or smth and gets scolded by his dad about it and i think he cries a bit??
then i think the ml and mc are at a beach or smth. i remember it being sunset when they were there, and also that the beach was near mls house
they make a sandcastle (i think…) and i think thats where the flashback ends
i also kinda remember the mc saying that all he remembers from that day is crying bc his dad scolded him for breaking a plate?
i really hope im not merging scenes from multiple series ive read into one and that this is a real manhwa cause i cant seem to find it in my chrome bookmarks (;´༎Д༎`)