[X] Descends Like Wildfire at the Festival's Beginning.Uruka asks Nariyuki what he is going to do at university and he realises he spent all his time trying to get into university but never considered what subject he wanted. The school prepares for a festival which, rumour has it, is jinxed so that any two people in physical contact during the fireworks will end up together. Kirisu decides her part of the festival will be a lecture on the Roman Empire, so to make it more exciting the other teachers decide to put her in costume...