This was a pretty entertaining one-shot manga. I think it could have been much better if it was longer since the ending was kind of abrupt, but for a short story, it was really good. I loved how the Aunt did things. She was pretty eccentric. GB was probably my favorite character. He was just too adorable and fun. Art-wise, everything was really good except expressions. It was often difficult to tell what emotion the characters were feeling. Story-wise, could have been better, but like I said, since it was a one-shot it had to be packed in. So with the space given, the artist did apretty good job.
Some strange or unexpected things happened, and sometimes the characters acted unexpectedly in a comedic way, so I really enjoyed this manhwa.
If you like typical, kind of silly, romantic-comedy manhwa, this should fit the bill nicely!