Level. 18 The World Hates Me

Level.18 I am hated by the world (わたしは世界に嫌われている) is the 18th volume of the Hai to Gensō no Grimgar light novel series.

Synopsis
Succeeded in repelling the orcs sitting in "Mt. Grief" in cooperation with Orion, Team Renji, Tokkis' and others. However, the sacrifice was great. Although he reunited with Shihoru, she was no longer the friend Haruhiro and his friends knew. Haruhiro's battle continues to save his friends.

Trivia
All current information on that volume comes from that tweet from the author: https://twitter.com/jyumonji_ao/status/1428903183397441549