According to its industry profile on platforms like the Internet Movie Database (IMDb) , the anime adaptation holds specific production markers: October 30, 2020 (Japan).
As you search for the complete title, remember that each fragment— Toshoshitsu , Kanojo , Seiso , Ochiru —is a key to a different locked room. Somewhere in that room, a pure girl is closing a book. And her story, like your keyword, is still being written. Toshoshitsu No Kanojo Seiso Na Kimi Ga Ochiru M...
Toshoshitsu No Kanojo Seiso Na Kimi Ga Ochiru Mama (The Library's Girlfriend, Your Pure Self Falling) According to its industry profile on platforms like
A breakdown of the that inspired the OVA remember that each fragment— Toshoshitsu