Oto has officially ended her engagement to Tenma. Even though Tenma knew in his head that this was the right thing to do, his heart didn't want to let her go. While Oto's now free to pursue her new relationship with Haruto, her guilt over hurting Tenma still haunts her. How will this affect her at the summer festival that Haruto has thrown for her?
— Description from Comic Vine community (comicvine.gamespot.com).