Rin Sasara

A cute, ichinensei, elementary girl who was saved from being hit by a truck by Iori Takatou. Iori meets up with Rin after his miraculous resurrection in the form of a cute, ichinensei, elementary girl when he starts attending the same class. Finding out that Rin is the girl he saved, he learns of Rin's first kiss has been reserved for him, her onii-san.