Why did it take so long for black hair to confess, its not that hard to say I love you or ...

I guess someone's never been in love before... it's hard to say it directly in front of the person you like cause you'd feel embarassed, awkward, you'll be thinking about your special someone's response whether it be 'i'm sorry' or 'I like you too'. Althoigh, it is also exciting, relieving, and satisfying to confess and let out that burst of emotions onto the person.

The moment he confronted the mc about liking him, he already gave himself away, tho the mc is ignorant of such hints because, as he said, he's straight in the interview, so mc was oblivious of the option.