Just as Rein was done reminiscing about his fifth life as an elf, his elf girlfriend of real life woke up. After Rein came out of the dungeon he had a very hard time with memories of so many lovers from so many lives. He would not be able to meet them ever again as at the end of the day, they all were just imaginations created by the almighty powers of a dungeon.
It took Rein quite some time to get out of that depression and he was only able to fully focus on his real life after he started meeting his current lovers of this life. Now Rein was determined to spend an eternity with all of them together.