Maybe you already received the quest "Crime Fighting" or "Organization" from her,
and you need to advance that quest to get her next event step?
Or you did the grave mistake of refusing to help her? https://renryuu.miraheze.org/wiki/Kimiko
If the download on itch isn't working for you, you can try the .apk from this folder link: https://mega.nz/folder/CpQXwBDS#wwZlWRrPWoGzZX5h0-MlRQ