@Hadski
@AbyssalMonkey
@Tcof
chapter 12:
17 years ago, chateau was a little girl
https://mangadex.org/chapter/363848/5
https://mangadex.org/chapter/363848/6
https://mangadex.org/chapter/363848/7
chapter 29: (also 17 years ago) male lead is a teenager so chapter 3's estimate of ML's age:
32 seems accurate.
https://mangadex.org/chapter/625721/1
https://mangadex.org/chapter/625721/3
chapter 30.5: little chateau's official age was stated to be 4
https://mangadex.org/chapter/649584/12
so chateau is 4 + 17 =
21 officially