I wouldn't be surprised if someone snapped a photo of them possibly leaving together, Chiyo getting her hands on it, and then immediately calling it cheating without hearing Igarashi's side. Not to mention his and Chiyo's friends won't even support nor corroborate his side, and immediately villainize him, and leading to him having to do something drastic and/or beg, arm and leg, for Chiyos forgiveness for a non existing problem that could just be solved through honesty and patience.
Holy shit, even writing that out it felt so bad yet fitting to Koi inu, i think Coco should stick to drawing and let someone else author, i shouldn't have the writing capabilities to produce a Koi Inu arc in the comments.