Same here, first rent and then can't find it again. Also it said use it at the beach the night but no event triggered anywhere on the map. Is it a bug?
The thing is, it's a fan/unofficial translation. So no licensing. Yeah it would be a problem if for example Mangagamer or whatever buys a license but doesn't look like it currently.
I am not fully sure but at least if you keep going and meet her but leave her without sex then you will get the "give her a massage" choice and she will be a little less mad
Katya has a hidden affection stat, which you can find the state of by asking how she's doing in the talk menu. Knocking her up before you raise her affection will make her depressed and miserable around you. You can slowly raise it again by playing catch and release at the pool and observatory. Tease her at the pool or proposition her at the observatory and if she's unhappy, don't push it, let her go. She'll slowly become comfortable around you again. Also, when you raise your massage skills enough by learning from Rena on her days off, you can offer Katya massages to raise her affection. Once her affection is high enough she is happy when you're around, you can knock her up without hurting her affection.
There's a chance for you to meet her on the mall only I've tried several times on H.F.F but she doesn't show up there only on the mall after impregnating her a few times you can unlock her into the Harem.
You need to impregnant Arcana, Ootori and Michelle more then 5 time and then when you go to Random classes she appears
I cant tell you specifically, like most the girls i just unlocked them by grinding. I think i first encountered her at the HFF resort in the lobby and chose to rape and impregnate her. Then she started showing up in town.
Chance like 1%? I went to the mall for 1 hour. Maybe something else needs to be done here?
