さよならおかえり愛しさに―恋について、教えてくれないか―

Sosuke is down in the dumps after suddenly being cast aside by his girlfriend. As he drinks his sorrows away in a bar, Tsukasa, an attractive bartender, agrees to watch over him for the night. Back at Tsukasa's place, a drunk Sosuke begs Tsukasa to give him some love advice. However, nothing could've prepared him for the response he's about to get... What's gonna happen to this straight guy who's clueless about love when he meets a charming bartender? A love story featuring a versatile couple with a big age gap.