Isekai Tensei: Kimi to no Saikai made Nagai koto Nagai koto

I was a delinquent that died when an accident occurred on a school trip. When I realized it I was the growing son of a farmer in another world. In this world where demons and demi-humans were in the middle of a war, I didn’t have some ability that made me a hero nor did I have magical powers. I didn’t know anything useful. Then, why was I reincarnated? Wait a second, when I reincarnated, was the girl who was my classmate that was riding on the same bus also reincarnated in this world? Alright, I’ve decided! I’ll reunite with that girl, and reach her with the feelings I couldn’t express in my previous life. Source: NU