The Spacefaring Diary of an Isekai'd Earthling, Vol. 3 - Isekai Spacefaring Diary, #4

The protagonist woke up to find that he was in a light novel situation: transported to another world. Except this other world is a highly advanced, spacefaring civilization. He has finally arrived at the ultimate spacefarer goal of the Imperium: become a mothership owner. On top of that, he has also discovered Earth, his home planet. What will he decide to do? Go home? Don't go home?