Despite their constant bickering, even cynical Hye-Min cannot deny that her relationship with Ma-Ha has become a deep bond of mutual trust and understanding. As a symbolic acknowledgement of their budding love, Ma-Ha presents her with a couple's ring on their 100-day anniversary. But as Hye-Min and Ma-Ha grow closer, it becomes more difficult for Shin-Bi to hide his true feelings, and So-Ryu's patience for his divided heart has reached its limit...