Kare no Shiranai Himitsu o Irete The Animation 1

"...What should I do...I...I shouldn't be doing this...with someone other than Naoya..." Yui and Naoya have just started dating, but their relationship isn't progressing. Then, the man to whom Yui lost her virginity reappears. Yui is blackmailed with her past actions. And she finds herself accumulating more and more secrets that she can't tell her boyfriend...