The person who called Ryuto to the gym at night was actually Maria. She confesses her desperation to become Ryuto's first, even if that means dressing and acting like Runa. Ryuto is shocked. As the two talk it out, someone else watches from the shadows.
Hey, Ryuto. Will you stay with me 
for the rest of the summer?
أخبرني يا ريوتو. هل ستبقى معي طوال الصيف؟
Sag mal, Ryūto.
Oye, Ryuto, ¿te quedas conmigo
el resto del verano?
Oye, Ryuto, ¿te quedas conmigo
el resto del verano?
Dis, Ryûto…
Ehi, Ryuto.
Ryuto. Você vai ficar comigo
pelo resto do verão?
Рюто… Ты же проведёшь
остаток лета со мной?