No she's in her 20s. It was said in one of the earlier chapters, but she like rarely leaves the house and very dependent on her sister so she comes off as childish and clumsy.
I don’t really care that much that she ended up with dahye but the way it happened was they like each other confess get together then end so it’s very meh could be better but they story was 4/10
Waited months for this glorious moment