Tsukushi agrees to be Tsukasa's girlfriend for a trial period of two months, but things get off to a rocky start when Tsukasa smacks Tsukushi's friend Yuki's womanizing new boyfriend. Then Sojiro and Yuki end up dating after Sojiro helps Yuki get a little revenge on the same boyfriend.

Tsukushi's friend Yuki is still fixated on Akira, a member of the F4. While struggling to understand him she immerses herself in a mysterious event from his past. Meanwhile, spies continue to track Tsukushi and Tsukasa's every move. The two of them will have to take some outlandish steps to outsmart the snoops and get some "alone time"!

While Tsukasa recuperates from his amnesia and head injury, a fellow female patient takes to visiting him. This seemingly well-meaning girl soon becomes a rival to our beloved Tsukushi. Meanwhile we catch a telling glimpse into Sojiro's past and meet his first female friend. Later, Yuki uncovers a message from this friend meant for Sojiro's eyes only.

Things are going smoothly between Tsukushi and her boyfriend Tsukasa, but the bliss can't last for long. Deep in the heart of New York City Tsukasa's conniving mother is cooking up another evil plan to destroy her son's relationship with Tsukushi.