Izumo is actually a girl.
Obviously have to throw this one out there. Why would there be Scenery Censor bubbles unless there is something to hide? Hmmmmmmmmm????- Could be, but as Anri can attest, Izumo has no breasts whatsoever. Other characters have seen his naked chest as well and the conclusion was always "he's a guy." I think the censor bubbles are just there for teasing.
Izumo's Dad only makes it look like their family is on verge of bankruptcy
He sees no other way to persuade Izumo into acting.