Kuzuki Yukino (played by Nakamura Yasu) was hurt when her boyfriend Aoshima Mizuki (played by Watanabe Shota), who was 9 years younger than her, said "I didn't even think about getting married".Because she didn't want to become a woman that Aoshima Mizuki hated, Yukino didn't ask Aoshima Mizuki. But when Aoshima Mizuki said to her "I am willing to accept everything from you Yukino, I like you", Yukino told him frankly,I was upset because of his words that he had no intention of getting married at all, and said that as long as he and Qingdao-kun could be together as they are now, that would be enough, and then he threw himself into Qingdao Mizuki's arms——.

The love between the two has now become deeper than ever and filled with happiness.They hugged each other regardless of the eyes of others, and then Kumiko Sakamoto (Tae Kimura) appeared in front of them.Qingdao introduced to Yukino: “This is my biological mother”. When Yukino heard this, he shouted nervously: “Your mother!?”.

The next day, Yukino was worried because Kumiko left without saying anything the day before, so she asked Aoshima during her lunch break.Qingdao admitted that he ran away from home two years ago and is now a stranger to Kumiko. Unexpectedly, she suddenly appeared again, and he is now very confused.

Then, Kumiko suddenly came to Yukino's house and said to Yukino: “I hope Mizuki breaks up with you”...!?In this case, Qingdao invited Yukino to go on a date.When Yukino arrived at the agreed place, he saw Aoshima standing there with a melancholy expression...!?