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.
I like you. Ever since you called me out 
for spreading rumors about Runa.
.أحبك. منذ أن استدعيتني لنشر الشائعات حول رونا
Ich liebe dich, seitdem du mich
wegen der Gerüchte über Runa,
Me gustas desde que me reprendiste
por difundir rumores sobre Runa.
Me gustas desde que me regañaste
por difundir rumores sobre Runa.
Je suis amoureuse de toi depuis que
tu m’as passé un savon pour les rumeurs.
Mi piaci,
Gosto de você. Desde que você me
repreendeu por espalhar boatos sobre a Runa.
Ты мне начал нравиться с тех пор,
как отчитал за слухи про Руну.
ชอบไงล่ะ