Diluc is an economics and business student. He happens to be in the same faculty as Childe, a troublemaker who likes to fight. Clearly, Childe is not someone who will be his friend. Diluc comes from a wealthy family and has been taught discipline since childhood, who is believed to continue his family's winery business. but somehow, diluc realized that childe was trying hard to approach him. but diluc thought it was just because diluc also liked riding motorbikes just like childe, but without him knowing.. childe who is 5 centimeters taller than him has a crush on him. It's impossible to be friends, Childe can't even wear a tie neatly.

One day Diluc accidentally mentioned his "girl" type because he was asked by his classmates. Unconsciously, Childe secretly heard that, and after that day Childe started to like wearing glasses and taking off his motorcycle jacket when entering class, his hair even looked neater. what is this sudden change? Diluc doesn't care.. he doesn't even realize it, until one day Childe accidentally entered the bar owned by Diluc's family, and coincidentally Diluc was there as a bartender.