In a long-term relationship, Yu's birthday incident sparks an argument, leading her to storm out. Upon returning home, she reunites with her ex-boyfriend from high school, Fukami.

Yu Kashiwazaki (Sae Okazaki) has dated Naoki (Daisuke Nakagawa) for the past 7 years and they have lived together for the past 5 years. Nowadays, their relationship has very little romance and Naoki seems to have no interest in marriage. On Yu Kashiwazaki's birthday, Naoki seems to care more about his new game than celebrating her birthday. Yu Kashiwazaki is unable to control her anger anymore and runs out of their house. Perhaps by fate, she then meets her ex-boyfriend Fukami (Kodai Asaka) from her high school days. Yu Kashiwazaki soon finds herself in a love triangle with Naoki and Fukami. Yu Kashiwazaki must now make a choice between her current boyfriend Naoki, who treats her more like his mother, and her ex-boyfriend Fukami, who makes her feel special. Her choice is?—AsianWiki