Of the three Otonashi family members gathered, Rion (voiced by Iwami Manaka) is the only one whose thoughts we’re privy to. She rightfully wonders just what the hell she’s gotten into, and also realizes she’s underdressed for the occasion. Kotoko breaks the ice with another vulgar remark involving her an Kurou, before leaving the three to decide on an a singular narrative for how the president murdered Sumi, and a mutually agreed-upon order of inheritance.
It takes Susumu, Kouya, and Rion less than three minutes to come to an agreement, which is so fast that Kotoko wonders if it’s an agreement that they came upon in advance. She then reiterates that both the president, his sons, his daughter, and her fiance all had cause to murder her, but since everyone had solid alibis and no further evidence, her death was deemed a random burglary and murder.
Rion picks up on the semi-accusatory tone as Kotoko describes the ways Sumi’s children’s alibis were all too convenient, timely, and fortunate—even her daughter Kaoruko breaking her leg. Kotoko further prods her by calling the theorizing entertaining. Rion speaks up for her older relatives, telling Kotoko she’s completely devoid of taste. In this moment I felt bad for Rion, because I knew Kotoko was so many steps ahead.
Kotoko makes clear that the president was adamant that “the crime get the proper punishment”. This is the opportunity for everyone assembled to come clean, and Susumu is the first to avail himself of that opportunity. To Rion’s shock, both he and her father Ryouma plotted to kill their mother, but someone simply beat them to it, while they were still planning. While Rion points out that her uncle and dad hated each other, they also both standed to gain from Sumi’s death, so they collaborated on a murder plot while remaining at odds about everything else.
Susumu even posits that his brother sent Rion to the meeting in his place so she’d learn of the crime, as a way of atonement. Before Rion can catch her breath, Kotoko gently prods Kouya, who also confesses that he and Kaoruko also plotted to murder Sumi so they could get married. The plan involved Kaoruko pretending to break her leg for the alibi, only to break it for real before she could do the deed.
Now that “the sins of the successors” have come to light, Susumu believes they’re all done there. But Kotoko doesn’t care about their past sins. She’s there to hear them give their explanation for how the president managed to murder Sumi before any of them could. She assumed that all the secrets flying around would disorient Rion, so thought it best to take care of all of those first, and then give everyone a chance to arrive upon a satisfying answer.
In effect, Kotoko proves that she is not someone to be trifled with, as she played everyone in the room like a fiddle. Everyone except Rion, the sole innocent, to whom Kotoko helped reveal her family’s dark secrets. Rion seems like an otherwise easygoing person who didn’t mind being ranked last in the inheritance. Will that change now that she knows the truth?