As Haruto explains to Oto’s mother that Tenma has left for America, he lets slip that this isn’t the first time he’s been inside the Edogawa house… Oto’s mother is scandalized to learn that Haruto spent the night all alone with Oto! With Oto’s mother firmly on Team Tenma, Airi decides that things need to progress in Oto and Haruto’s stalled relationship… by stranding them alone at her vacation home!
— Description from Comic Vine community (comicvine.gamespot.com).
