Otto no Keshikata

Ryo, my husband of six months, has become distant lately. Every time I speak to him, he seems irritated and responds with sharp words. Our strained relationship has taken a significant mental toll on me, but thankfully, I can lean on my best friend Miku. She's someone truly precious whom I trust and can confide in about anything. One day, I decide to surprise Miku with a visit, only to find my husband's car parked outside her apartment. He'd told me he was heading out for golf with his boss early that morning, but it turns out he was lying. The truth? He's been sleeping with my best friend behind my back! And as if that weren't enough, he showers her with affection he never shows me while also trash-talking me. As I grapple with my disbelief, a dark resolve forms within me, urging me to get rid of both my husband and best friend. (Source: MangaPlaza)