Mayou Otoko
Spin-off from Punch Up Chapters 1-3: a no sense of direction but great architect who works with an interior coordinator who was a fan, since the interior coordinator have a habit of not ignoring/taking care of people/ pets they became close and later became a couple but the architect have weird sense of love or still exploring love while the interior coordinator was getting insecure because of the ambiguity of their relationship with no assurance. Chapter 4:(page 154) a student entering a dorm life since his brother passed away but the room was haunted with a ghost who have regrets and can't pass over yet but when the ghost was about to attack the student, his brother's ghost came out to protect the student but it turns out that they knew each other and the regrets the brother have was about the other ghost's passing so when they are exorcised(they became one) they passed over peacefully. (page 188) Afterword (page 193) crossover with punch up
Perfect World
Prequel(spin-off) - Yasashii Kankei
In The Apartment