The Melancholy of Haruhi-chan Suzumiya - Season 1 Episode 4 Kyon-kun, Nagato-san.... Nagato-san...

Mikuru finds out that Yuki is viewing erotic images on her laptop, but is too embarrassed to tell what she's seen to Kyon. Several weeks go by, and several changes are noted. Kyon finds that the bookshelves in the room are being filled with video games, and Haruhi begins to notice Yuki wearing cosplay outfits. When Mikuru finds the outfits, a cosplay war breaks out. Meanwhile, Ryoko has revived herself, but in a foot-tall chibi form. Eventually, Yuki finds out, and after saving the miniature Ryoko from a hungry cat, allows her to stay with her at her apartment.