Ken doesn't confess his love. He destroys a relationship to get close to the person he wants, then watches it all collapse anyway. This OVA refuses to romanticize what is actually sabotage, and it won't let you off the hook for understanding why he does it. The quiet aftermath is where the real damage lives, not in the betrayal itself, but in the certainty that nothing he wanted was ever going to happen the way he imagined it. That's the entire point.
Ken has always kept his feelings for Ritsurou locked away, content to exist in the margins of his best friend's life. When Ritsurou starts dating Moeko, Ken finds himself watching from the outside, unable to voice what he's been holding onto for so long. After dropping out of school, Ken convinces Ritsurou to move in with him, hoping proximity might somehow change everything. But waiting and hoping aren't enough. Desperation pushes Ken toward a reckless choice: seduction as a weapon, betrayal as communication. Sleeping with Moeko becomes an act of sabotage, a twisted confession that spirals everything into chaos. What Ken wants and what he's willing to do to get it collide in painful, irreversible ways. This OVA sits in the uncomfortable space where love curdles into obsession, where best friends become strangers, and where one night unravels years of careful silence. It's raw and morally murky, asking what happens when longing transforms into destruction.