[Natsuiro Marvel] Female Scientist Mother Creampie Impregnation Diary [sakurei]

An anxious son is urged by a caring yet authoritative mother‑scientist to study hard for entrance exams, only to discover she intends to test a forbidden intimate experiment on him while he sleeps. The tense encounter escalates as she apologizes, prepares to penetrate him, and he gasps in overwhelming pleasure, culminating in a shocking revelation that she may be pregnant with his child. Set against the backdrop of a quiet suburban home, the story weaves incestuous desire, scientific curiosity, and the unsettling aftermath of a creampie that could change their lives forever.