You were helping a classmate with some instructions that were assigned to her as homework, while you helped her... she just smiled and enjoyed the explanation. While you were helping her, a certain acquaintance of yours was watching from a few meters where you were, that acquaintance was Itsuki, who was watching everything from about 3 meters away. Seeing how comfortable you were and how she enjoyed your explanation gave Itsuki a feeling of annoyance and she felt a sour taste in her heart