[chin] Mabudachi Nagachichi Daihenshin Ch. 1-4 | My Best Friend's Transformation Into A Long-Titty Girl Ch. 1-4 {Doujins.com}

A bespectacled man is blindsided when his close friend turns her hormone-driven transformation into an exaggeratedly voluptuous body, complete with enormous breasts, a cinched waist, broad hips, and heavy thighs. Secret experiments escalate from masturbation beside his sleeping form to oral sex, paizuri, and increasingly chaotic encounters, while their banter about estrogen, lubrication, and being discovered by her mother turns an awkward bond into a risky private comedy. By the end, she poses proudly beside him, satisfied with how completely the transformation has reshaped both her body and their relationship.