天城恭一（速水もこみち）が佐藤唯（松井愛莉）の言い付けを守り、唯に関わらなくなって数日、唯は愛犬を亡くして初めての誕生日を迎える。一人きりの寂しさに襲われ、なかなか寝付けない唯。よりによって外は嵐。窓に打ち付ける風が気になり唯がふと外をのぞくと、そこには風雨の中、花束を手に立ち続ける天城の姿が！無視を決め込む唯だが、しばらくしてサイレンの音が響き渡り…！？後日、唯は先輩の石川麻美（片山萌美）に誘われ合コンに出かける。相手はライバル製薬会社の宮川（ショーゴ/東京ホテイソン）と姫田（たける/東京ホテイソン）。店の片隅には、またしても恭一の姿が！気持ち悪さを紛らわそうと酒をあおる唯。しかし、その酒にはある罠が仕掛けられていて…。
Kyoichi Amagi keeps the word of Yui Sato, and a few days after she becomes unrelated to Yui, Yui celebrates her first birthday after losing her dog. Yui is struck by the loneliness of being alone and cannot easily fall asleep. The outside is a storm. I was worried about the wind hitting the window, and when Yui suddenly looked outside, I saw Amagi holding a bouquet in the wind and rain! Yui decides to ignore it, but after a while, the sound of the siren echoes ...! ?? Later, Yui is invited by her senior Asami Ishikawa to go to a joint party. The opponents are rival pharmaceutical companies Miyagawa (Shogo / Tokyo Hoteison) and Himeda (Takeru / Tokyo Hoteison). Kyoichi is once again in the corner of the store! Yui drinks sake to dispel her discomfort. However, there is a trap in the sake ...
