This is LOVE, but NOT love

Flower petals fall, a light breeze whistles through the trees, and romance is in the air for many high school youths. However, this is not the case for Ren Yaotome. Contrary to her bubbly personality and girly appearance that makes her seem mature, she is as inexperienced in love as many others in her year. Although she dreams of a once-in-a-lifetime romance, there is no one who seems to catch her eye in that way—especially not the blunt and strict Yuusei Hidaka, whom she cannot help but clash heads with on a daily basis. Yet, even Hidaka has a soft spot for his little sister, Manami. It is simply fate that Yaotome and Hidaka will never see eye to eye—until a near car accident causes Yaotome and Manami to switch bodies! The two try their best to hide their situation, and when a possibility to switch back appears, Yaotome jumps at the chance—but why is Manami so hesitant?