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.
Did you call me here to get revenge 
against Shirakawa-san?
هل طلبت مني الخروج للانتقام من شيراكاوا-سان؟
Hast du mich gerufen,
um Rache an Shirakawa zu nehmen?
¿Me lo pediste
para vengarte de Shirakawa?
¿Me lo has pedido
para vengarte de Shirakawa?
Tu n’aurais pas fait ça
pour te venger de Shirakawa ?
Hai voluto che ci vedessimo
per vendicarti di Shirakawa?
Você me atraiu para
se vingar da Shirakawa-san?
Ты всё это сделала,
чтобы отомстить Сиракаве?