[Akubinium] Marriage Planning-Guide #2 (COMIC LO 2022-06) {Mistvern}

Little sister Sazanka wakes one morning with her memories wiped blank, unable to recognize the house, the family, or the older brother who loves her. With no past to hold her back, she gives herself over to her brother's touch and the overwhelming new sensations he draws out of her, her whole body trembling as he finally fills the little-sister-sized hole in his heart. Her memories never return, but with a hand-written marriage planning guide addressed to her beloved Nii-ni, she sets about building a brand-new life and a brand-new love from scratch.