@Rebel against the harem The biggest difference is his killer is not a scum of an ass**** or a traitor, but someone who was willing to have an honest fight with him. The power and skill difference were just too much.
The Galactic Navy Officer Becomes an Adventurer
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM
by Takuma Tomomasa , A_Itoh
Available on mangabuddy for reading, and for sale at https://www.amazon.com/dp/B0BT6V7CMM