What kind of GAP MOE gets you every single time?

[anzxmxxn]

I love male characters who initially seem like they don't need love at all, but after meeting the MC, they turn out to be the ones who need it the most. Plus for me when they have a tragic backstory
The gap between their rough, intimidating exterior and how completely lovestruck and affectionate they become after meeting the MC and story goes. Seeing a tough guy turn into an absolute sweetheart for the person he loves gets me every single time