The Sister‑in‑Law Who Yearns: A Promiscuous Relationship (2001)

Megumi’s every thought pulses with desire as she pours her loyalty—and her body—into supporting her struggling actor husband, Kazuo. Their modest home brims with unspoken yearning, each tender kiss at night a reminder of passion simmering beneath routine. When Kazuo’s dazzling star brother Ryōji arr