I just really want to know why mom wears a bird suit and no one questions it. Plz, the mystery is killing meee
I know it’s a super late reply and perhaps nobody will read this. So the Indonesian scans have completed the story and I can read a little Indonesian.
To answer the question why Mum/Rio wears the bird costume, it’s because of his insecurity regarding being a man and being unable to have a family naturally. I don’t think that Jun’s parents have revealed that they are a gay couple to Jun’s friends’ families’ and they use the excuse that Jun’s mum is allergic to the sun and that’s the reason why he wears the bird costume.
As a child, Rio was put into foster care when his parents disappeared and his older sister decided to go her own way. I think that that trauma coupled with his insecurity about his sexuality lead him to decide to hide himself away from the world. It seems that meeting Dad/Yoki helped him a fair bit to accept himself and his past.
Also, Jun’s birth mum is Rio’s older sister who happened to be a senior of Yoki’s in university and was his ex. I think that Jun is a result of that relationship. Rio’s sister seems to be a free spirit who wanted to explore the world and not get tied down by family, so my guess is that Yoki and Rio decided to raise Jun by themselves, fell in love in the process and became a family unit.
Jun is not aware of that fact and that Mum is actually a man. Rio does say at the end of the manga that he would tell Jun everything when the time is right but seeing as how Jun is only six going on seven, it just isn’t the right time to explain everything to him yet.