Dr. Saotome returns from the dead after being seemingly murdered by Getter pilot Nagare Ryoma and threatens the world with his ultimate creation: the Shin Dragon. Ryoma reluctantly teams up with his former co-pilots Jin Hayato and Tomoe Mushashi to combat Dr. Saotome. The pilots must also deal with the mysterious Invaders, aliens that have the ability to possess humans and warp their flesh to form hideous creatures.

This OVA is a summary of the first three episodes of Hellsing, with the animation style of Hellsing Ultimate and following the events of the Hellsing manga.

Akari Akaza, Chinatsu Yoshikawa, Kyouko Toshinou, and Yui Funami return to commemorate an exciting occasion! Despite their initial bizarre celebration ideas, they decide to hold a party at their Amusement Club room. With the help of friends from the Student Council, they start preparing for the big day—with a surprise planned for a special someone. Join the girls as they work together to create an enjoyable and memorable party, all the while interacting with one another with their cute and unique quirks. [Written by MAL Rewrite]

Ichigo Mashimaro encore is a two-episode OVA continues onwards from the previous set of OVAs of Ichigo Mashimaro.