Your kindness. It's a very important factor. When you are kind, living together becomes a pleasant thing as there will be less conflict and more harmony.
It could be anyone really. A person who has a collection of interesting stories and likes to be in a relaxed state when sharing them. For instance, a traveler who has had many adventures and likes to put on a cozy robe in their living room after a long journey and then tell their travel stories to friends or family. Or it could be a teacher who wants to make the story - telling session more engaging for students by creating a bit of a theatrical element with the robe - wearing and then sharing a historical or literary story.
It simply implies that the speaker has the intention of donning their robe and then proceeding to tell a story. The robe could be seen as a symbol of comfort or a sort of ritualistic garment for this storytelling event. It might also suggest that the story is something personal or special, and the act of putting on the robe is part of the build - up to sharing it. For example, if it's a family story, putting on the robe could be like getting into the right frame of mind to pass on a family tradition through the story.
Light novels can cover various genres. This one could potentially be a slice - of - life story about two characters starting to live together. Maybe there are comical situations that arise from their different personalities or habits. There could also be elements of friendship or even romance developing as they live together.
Another option is to check out specialized anime and manga stores. Sometimes they also stock light novels. You could also search for it on second - hand book platforms in case it's not easily available new.
I'm not sure as I haven't read it specifically. But generally, a 'regressor' in novel terms might imply a character who goes back in time or reverts to a previous state. So perhaps this novel is about a character who is not such a regressor and has a different kind of story, like a forward - moving adventure or a story based on present - day challenges.