Genkai OL-san wa Akuyaku Reijou-sama ni Tsukaetai - Vol. 1 Ch. 5

[Remearex]

bro this ain't yuri it's just an OL baby-sitting some teenagers ._.

 

[Ahdharr]

"I wanted to meet your school friend." A lot harder to change this plot than it looks I guess.

 

[IbnAurum]

Hmm if im not mistaken, the prince is one of us, fellow yurigazers!

 

[Lev360]

Go Natalie san go for both route

 

[Hadal]

the villainess is dummy

 

[BoruBagaWanu]

My heart! The scene at the end with Natori swearing her devotion to Lapis-sama. Diana menacing a crown prince to protect our isekai heroine. Even the prince seems to love this trio.
Aristocrats married for political reasons, and they commonly had lovers on the side.