Fujiwara Hana and Katayama Mizuki have been best friends since elementary school. When Hana is abandoned by the boyfriend who was cheating on her, Hana and Mizuki take a trip together to ease their pain. They meet two guys - Narita Yosuke and Ichinose Ayumu - at a hot spring inn at their destination. Although they have just met, Yosuke suddenly scolds Hana, who doesn't have that in nature to say what she thinks. At first, Hana is defensive.