Toshoshitsu No Kanojo Seiso Na Kimi Ga Ochiru M... =link= Direct

(図書室の彼女 ～清楚な君が堕ちるまで～) English: "The Girl in the Library ~Until the Pure You Falls~"

This looks like Japanese Romaji. Based on common light novel, manga, or web novel title conventions, the full title is likely: Toshoshitsu No Kanojo Seiso Na Kimi Ga Ochiru M...

These micro-tensions make the library an unmatched setting for slow-burn corruption. or web novel title conventions