Thanks if you can help!

I only remember a scene....
Its a yaoi with baking sweets as a theme.
I'm not too sure as to how accurate my memory is but
Theres the father, A, B and C.
A and B are together. and C is like the third wheel.
The four people went abroad to study/train their skills.
In this particular scene, despite the amount of cakes that is placed in front of A, he manages to pick out and eat the cakes B made.
=v=