Tina invites everyone to Kyushu to visit the hot springs there. Much to Kaoru's dismay, men and women are allowed to bathe together so he must join his lady friends. When the group arrives at Hakata, Tina's home prefecture, she insists on getting some alone time with Kaoru, and then convinces him to act like her boyfriend!

As Kaoru and Tina continue on their date, Tina asks Kaoru to take some pictures of her - and then tells a story about how she ran away from this guy that she liked because she was afraid of him hating her. But the end of the story, she reveals a secret that may win his heart!

With so many secrets revealed, Kaoru's life has been turned upside down. He must handle his own issues before taking on more responsibility. Tina and Aoi must confront their own feelings before facing each other. Love is still in the air and Chizuru is hoping to get a big whiff.

With Aoi missing, Kaoru is sick with worry. Tina suggests that they visit Aoi... but before they can, Miyabi returns with some shocking news. The boarding house is closed, and everyone has one night to pack their belongings and leave! Meanwhile, the other "Kaoru" continues to woo Aoi, since he will inherit the Hanabishi family fortune. Will Kaoru's true love be lost forever?

Aoi finally acknowledges for whom her heart pants: Kaoru. She doesn't want to marry his evil younger brother. It seems that Kaoru must figure out what to do with his brother and the harem if he really wants to share his life with Aoi. Tina also has feelings for Kaoru. Will this story have a happy ending?

When the beautiful Aoi stepped into Kaoru's life, he got all of the difficulties of co-habitation with none of the fulfillment. In order to renew their arranged engagement, Kaoru must return to the family he ran away from, and he's not prepared to do that. As if things weren't stressful enough, the new tenant in his building, the Japanese-raised American Tina, tests the limits of Kaoru's gentlemanly restraint with her open flirtation.

Imagine being engaged to a beautiful loving billionaire, living in a posh western style boarding house and being surrounded by sexy flatmates. Sounds like the perfect life, right? For nice guy Kaoru, it's not so easy. He has to keep his engagement to Aoi a secret, struggle with his contempt for his family and do his best to avoid the flirtatious advances of his fellow boarders, all this while under the scrutiny of Aoi's guardian, Miyabi.

When Kaoru runs into his childhood friend Mayu, who is home after her stay in jolly old England, she greets him with a big, wet European-style kiss! The longtime companions share an intense, intimate history together, which causes an upset Aoi to wonder if her fiance's brains are getting caught in his zipper. Filled with feelings of guilt, Kaoru sets out to do the right thing... but where does his heart really lie?

While Kaoru and Tina are going ape over the animals at the West Animal Zoo, poor little Aoi has got her panties in a bunch worrying what the two are doing. But while Aoi's going bananas, Kaoru and Tina get yanked into a park attraction that will force them to choose if they are 1) Not even friends, 2) More than friends, or 3) True loves.

In Kaoru's dream, Aoi announces that she can no longer stay with him. But the declaration turns into a revelatory nightmare when Aoi's father decides it's time for her to start seeing other men before committing to Kaoru! Will Aoi continue to be daddy's little girl?

It's hot fun in the summertime as the gang heads to the beach... but what to wear? Kaoru accompanies the women on their search for the ultimate swimsuit, and Mayu and Tina are at it again, competing for Kaoru's attention. Chika joins the crew for some sizzling times, but Kaoru and Aoi sneak off by themselves - Aoi has something "special" to show him!

Does size really matter to Kaoru? Aoi thinks so and is willing to try anything to boost her bust. When Kaoru and Aoi finally get some time together alone, things start to "spice" up. Kaoru takes Aoi to a very special place that is near and dear to his heart.