While Sheila was fighting with the man with a gem in his forehead, Yuna and Ria were running around looking for a good place to hide. If it were people with common sense, rather than hiding, they would go toward the teacher's lounge and told the teacher about the screaming and all that. However, both of these girls have a different opinion than those on this matter. Although Ria didn't know anything, she can sense the urgency of the situation based on the reaction of Sheila. After all, the latter is very cautious when it comes to her loves one.