The story takes place during a summer of continuous sunshine when water supply restrictions are issued in the city. Shunsaku Iwakiri works for the city’s water department and his job is to visit homes and stores that are behind on their bills and either collect the money or shut off the water supply (water suspension enforcement). Shunsaku is separated from his wife and children, and his heart grows thirsty as he spends his days visiting poor households and being abhorred. One day, during a water shutoff, Shunsaku meets two young sisters who have been neglected. He sees them as his own children and offers them a helping hand.

Sasha tries to get her soon-to-be ex husband Kyle laid so she can move on with her sex life guilt-free.

Hee-Soo (Kim Sun-Young) is a popular songwriter with numerous hits, but she is going through a dry spell. She wonders if she lost her inspiration, because she is lonely. Hee-Soo then meets a boy (Byun Joon-Suk) in the elevator of an apartment building. She notices his stares. Hee-Soo feels a new song coming about. On the pretext of giving the boy music lessons, Hee-Soo gives the boy a lesson in love. As time passes, the boy falls for her more and more and Hee-Soo’s song is almost completed. At this time, Joon-Ho, who taught her about love and music, returns.

Like many couples, April and Derrick feel like the spark is missing from their marriage. With the demands of work and their hectic schedules, they find themselves in a six-month dry spell. Desperate to shake up their love life and rekindle their passion for each other, they decide to share a steamy night with their free-spirited friends, Christy and Matt. Soon after, April and Derrick find themselves dealing with unexpected feelings and must find a way to let go of the mistrust and fall in love with each other all over again.