strike witches, strike witches: suomus misfits squadron, world witches series
erica hartmann, ursula hartmann
youkan
2girls, blonde hair, blue eyes, blush, clothes lift, doctor, flat chest, glasses, incest, lab coat, multiple girls, nipples, open mouth, playing doctor, shirt lift, short hair, siblings, sisters, sitting, skirt, smile, stethoscope, sweatdrop, twincest, twins, yuri