"The joys of life's offerings / drinking up your love..." The Japanese poet Toson Shimazaki's poem "First Love" provides the key to unlocking the Fourth Apostle, the latest stage in Shizuku's battle. Coincidentally, he runs into an old acquaintance of his own — and soon embarks on a quest for the wine that evokes a first love best of all. Meanwhile, Issei is on a lonely journey into his own past as well...