四十八手 忍び居茶臼
男はあぐらをかいて後ろ手で体を支える。女は対面で男に抱きつき、腰を落として挿入する。別名、櫓 (やぐら) がけ。
The man sits cross-legged. The woman squats, facing him, onto his penis. Also known as "Yaguragake" (On the Tower).