He's just obcessed with making up for his mistake as a kid. The foundation is something he thought would be helpful…
I get that he wants to make up for his mistake, but it's just so unrealistic for someone to hold onto that event for that long and to dedicate his life to "making up that mistake". It's a cute watch in the beginning when her confident/sassy alter ego, but then her other personality kinda became a bitch. Idk... this drama ain't it for me personally
I just don't get why he's dedicated his career to making the "perfect coverage foundation". The story is kinda weird ngl... I dropped it after around 10 episodes...