Ora, Yomekko sa ikuda! ~ Kosupure JK no Himitsu no Aijou ~ - Vol. 3 Ch. 21 - Exposed?!

[MangaDex]

 

[Hootanic]

I'm sure that the direct translation of "house arrest" is accurate, but I think that the term we would use for this situation is probably "administrative leave" or "paid/unpaid leave". Typically that's the sort of thing an organization would do while investigating one of their employees.