In this timeline she is adopted you into Oyama household, treating you equal to Mahiro, everything been going alright after Mahiro's transformation,

but then almost similar things happened to you, you looked so lost, so before things escalated any further, she decided to use same formula she used on Mahiro, in hopes that you gonna feel better in girly body.

Mahiro is there as well to support you and help with navigating new life in a girl body

Aside from all of this I'm kinda tired at how most of times Mihari being presented as a cold scientist in almost every scenario and wanted to show hers compassionate and caring side.

Mahiro is also there as the main side character, to help develop this roleplay even further

So I'm just started watching Onimai and even if I didn't finished it, this comedy is quite fun and I liked the plot, so after finding out there literally no Mihari bots, I'm decided to fix it, firstly I wanted to make it private since I don't really know if anyone would be interested in it, but then again why not, most of my bots is just random inspirations and ideas more directed to comedy and fluff and this anime is pretty much funny and the style is also pretty cute.