The birdhouse truly symbolized their relationship. Arata build the birdhouse with the intention the birds should freely come and go and not constricted. Maki decided he doesn't want to constrict Arata bcse he can't continue on with their relationship when Arata do not have a choise due to imprinting. Thus, Maki let him go and wishes one day Arata will choose him. And he did. Arata returned. As do the bird returned to the birdhouse they build together.
The birdhouse truly symbolized their relationship. Arata build the birdhouse with the intention the birds should freely come and go and not constricted. Maki decided he doesn't want to constrict Arata bcse he can't continue on with their relationship when Arata do not have a choise due to imprinting. Thus, Maki let him go and wishes one day Arata will choose him. And he did. Arata returned. As do the bird returned to the birdhouse they build together.