[Oshima Aki] Totsuzen Ane ga Dekita Hanashi 4 | The Story of How I Suddenly Got Older Sisters 4 [Rirare Translation]

A shy younger brother is stunned when his two voluptuous older sisters, driven by a secret pill, become bold and forward in their affection. Their teasing touches, provocative gestures, and intimate advances turn everyday moments into heated encounters that challenge his resolve. Will his resistance crumble under their relentless, seductive pursuit?