MaddieK's manga / #tribe(2)

Lutah tribe exchange student and his Japanese caregiver who hosted him while he stayed in Japan to learn things for him village.

Guy has a friend named Ban who travels a lot and he brings him back a weird piece from a tribe. Then gets hit by a car and dies. But that weird piece sends him back in time when he falls or jumps from something. So he works to keep going back in time to save Ban. Then eventually goes 8 years back and doesn’t even meet him in the first place. Then after the day of the death he meets him and they fall in love again.