Naoya Mukai has loved Saki Saki since grade school, and when she finally accepts his feelings, he's at his happiest. But one day, a cute girl named Nagisa Minase confesses to him! Not wishing to choose only one over another, Naoya chooses to go out with both of them!! What will be of this love triangle that challenges morality itself?
Following their trip to the hot springs, Naoya decides to continue his two-timing relationship with Saki and Nagisa, and will treat them fairly. Add to the mix, Mirika who kissed him first, and Shino who has a secret crush on Naoya. The stage is set for the five lovebirds as summer vacation arrives. Fireworks, camping, and then to Okinawa... Mirika's younger sister, Risa, also makes an appearance. The neo-standard love comedy gets more and more exciting!