My Younger Knight Takes Care of Me in Another World manga volume 2 features story and art by Nekonomori Shima.

Back on Earth, Mitsuki was just your average thirty-something office worker. He certainly never expected to wind up having a grand, magical adventure. But here he is, living in a fantasy world alongside Volk, a younger man who turns into a large black wolf now and then. It's a lot to get used to, but Mitsuki enjoys his new life. He just wishes that he could find some purpose in this world so he wasn't such a burden to Volk and everyone else. Can Volk convince his lover that he's fine as he is? The story comes to its romantic conclusion!

FINAL VOLUME!