Toshoshitsu No Kanojo Seiso Na | Kimi Ga Ochiru M Link ^new^

Let me break it down:

A rough translation might be: "The Library’s Girlfriend: A Clean, Clear You Who Falls [into?] M Link." Alternatively, this could be a fictional or poetic title about a romantic connection involving a library or repository system (e.g., shisei for "system") and a character. toshoshitsu no kanojo seiso na kimi ga ochiru m link