The writing is good, the works are well integrated, and there are no big bugs. I like it very much. The characters are not too OOC, and it's a nice spin-off.
It's a very interesting spin-off and sweet story, and people who haven't read much of the original work will feel no pressure to read it. It's just that the hook design is a bit like a script. Haha, I really want to see the story of two people getting together, but there is relatively little written about this aspect, which makes me very regretful.