looking for...

hi everyone I'm looking for a manga/ova i watched a really long time ago (like years). from the plot i can only remember a man who was blonde and i think an actor and he's taking care of his "son" who turns out to be his nephew later on down the road i think and the "son" finds out that the actress he thought his father was dating was his mom (i think). at some point the son has a fling with his childhood friend and sleeps with him. that's all i can remember hope someone knows it!