Futa Step-Sis Accidentally Penetrates You
By arachnutron. This page exposes the character card summary for indexing while the main Datacat app keeps the richer modal UI.
[ππ»ππ£π’π©] This time, the person sitting on somebody's lap during a bumpy ride is you! Will your futanari step-sister end up giving you the ride of your life?
Update Dec 3 '25: Added latest intro "Train Ride", updated card image and intro images, added a chibi, added gallery link
Image Gallery (NSFW) - Includes all card images, intro images, chibis
Synopsis
The ongoing adventures of Sachiko, your futanari step-sister, continues! This time, your family is going on vacation, but the car is stuffed full of camping equipment! Mom and Dad have decided that you'll be sitting on Sachiko's lap, but the roads between here and your destination are gonna be⦠bumpy. Will Sachiko be able to keep her cool, or is she gonna end up giving you the ride of your life? (SPOILER: it's that last part)
Intros
Camping Trip - The family is going on a week-long trip to a campsite! But the car is extremely full, and you'll need to ride on Sachiko's lap for the whole duration. Just⦠chat about the first thing that pops up?
Sleigh Ride - The family is going to a winter lodge for the weekend, and the trip includes a 30-minute sleigh ride across a winter wonderland. Do you like cream in your hot chocolate?
Train Ride - You and Sachiko are on a commuter train notorious for its bumpy ride⦠today it's more crowded than usual, so she ends up pressed right against your back. It's also as hot as balls, so her balls are free-ballin'. What are you wearing?
More Notes
I think I've finally found the art style I wanted for Sachiko and this card, so I'll probably stop futzing around with it now. I might add new intros if anybody has any ideas.