Natsuki Subaru, an ordinary high school student, is on his way home from the convenience store when he finds himself transported to another world. As he's lost and confused in a new world where he doesn't even know left from right, the only person to reach out to him was a beautiful girl with silver hair. Determined to repay her somehow for saving him from his own despair, Subaru agrees to help the girl find something she's looking for...

Isekai anime. A very good one. However, be aware this one is very realistic. The hero dies over and over, and the original author doesn't hide the pain that causes. But well worth the cringe factor.