Sissy's activites

Computer science major Chu Sangwoo is the epitome of an inflexible and strict rule-abiding person. W...

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male leads that regret treating their significant others like shit, ignoring them, rejecting them, etc. 

dont your heart just clenches hard and your lungs cease to exist whenever you read a character that regrets letting go their significant other? that realization of wanting to be with them but they're already far away? that horror in their faces when they realize that them moving on means they'll be with someone else instead? their anxiety rising while thinking, "what if i am too late?"