"Teru and her friends sneak aboard a yacht in order to save Rena and foil Morizono's plan to sell the new 'Jack Frost' virus. The rescue mission turns out to be more than anyone bargained for, however, when Kurosaki runs into a man who makes his blood turn cold" -- from publisher's web site.

A cell's job is never done! Between fighting off respiratory infections, dengue fever, and a serious case of hemorrhagic shock, Red Blood Cell and White Blood Cell have been working harder than ever to protect the body from bacteria and diseases. But with new challenges comes new allies, and it's up to all the cells to come together to keep the body--their home--safe from harm.

"As Teru comes to terms with Kurosaki's past wrongdoings, Kurosaki searches for the culprit who is trying to resurrect the 'Jack Frost' virus he created. But when he learns that Teru might be in danger, will he keep his promise to leave her alone, or will the two be reunited?" -- p. [4] of cover. After orphan Teru Kurebayashi loses her beloved older brother, she finds solace in the messages she exchanges with DAISY, an enigmatic figure who can only...