With all this set, I feel like Diesel's family is going to come for him, Ein will let him go but Diesel will come back with his real name after figuring out his feelings. The author has made some strong points with Diesels story - not knowing if its love, that love is not something you try to keep by hurting others, and that his real name is unknown, etc... I think it would be fitting for him to return to Ein with his real name, like starting again without the fear, anxiety and uncertainty of the relationship.
With all this set, I feel like Diesel's family is going to come for him, Ein will let him go but Diesel will come back with his real name after figuring out his feelings.
The author has made some strong points with Diesels story - not knowing if its love, that love is not something you try to keep by hurting others, and that his real name is unknown, etc... I think it would be fitting for him to return to Ein with his real name, like starting again without the fear, anxiety and uncertainty of the relationship.