After being dumped by her boyfriend, Ebihara Yuiko, also known as "Ebiko," gets drunk and in the heat of the moment kisses her boss, Taijima Ryosuke, whom she admires. The next morning, Ebiko wakes up to find Mizunuma Osamu, the manager of the aquarium shop she stopped at on her way home, sleeping naked next to her in bed

After getting drunk, Ebiko is taken care of by Mizunuma, the manager of the aquarium shop, but has no memory of what happened the next morning. Ebiko confesses everything to her colleague Saya Izumi, and reveals that she has given up on her boss Taijima, whom she admires, and that she will live her life as a "shrimp."