(1) Koo is a fully grown man who is MENTALLY six year old.
He look like a normal 18 year old but behave like a 6 year old ( except in some special occasions)
=> Zia referred him as "big baby" Coz he doesn't look like a baby(2) facts about Koo:
•Jealous and possessive
•Isn't a normal human
•He is talented
•Has mood swings
•He like video games
•He like food
•He like kdramas
•Good at flirting (thanks to his kdrama addiction)
•He like ᶻⁱᵃ
![](https://img.wattpad.com/cover/198235695-288-k497564.jpg)
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ʙᴀʙʏsɪᴛᴛɪɴɢ ᴋᴏᴏᴋᴏᴏ || JJK FF
Fanfic🥈 LY AWARDS 2020 [ONGOING] "Hello Noona, I'm Jeon Jungkook. But i prefer Koo. And I'm 6 years old " said the cute guy and flashed his cute bunny smile. Wait..what???!!! 6 years old?? Am I going to babysit a bigbaby? . . . . High School student Park...