Miharu wins a trip for the whole gang to a hot springs resort! But when they arrive, they find that the springs have dried up, and the group heads to a nearby river where the girls change into bathing suits and enjoy a brisk swim instead. They get caught up in their fun a little too much, and the sun sets, leaving them lost in the mountains. After some searching, they find a lodge - occupied by Kazuharu and Lisa.

Yukinari watches a horror film with friends, only to be interrupted by Tomoka's tantrum. She yells, "I want to play a more mature and thrilling game!" Just then, Fukuyama drops by for a visit and introduces the group to "Cosplay Mah-Jong" where the losers must change into assorted costumes. The mature, thrilling and exciting game finally begins!

Miharu is kidnapped and confined inside the Space Management Bureau. Yukinari and the others frantically search for her. Exasperated, Fukuyama decides to use his family's spy satellite to find her. The satellite captures a distinct shadow of a mysterious figure following Miharu into Yukinari's house. Using the power of the star mark, Koyomi sends Yukinari and the others to Seiren. Will they save Miharu and discover who is behind her kidnapping?

Yukinari's got major girl problems - the poor guy is literally allergic to them. But things start looking up for Yukinari when he accidentally plays peek-a-boo with the naked girl next-door. She freaks out and boots him in the face, magically transporting our hero to the coolest place ever: Seiren, a mystical land populated mostly by girls. As soon as he gets there, he meets Miharu, a super-bouncy, carefree cutie who can touch Yukinari without causing a rash!

Yukinari's got major girl problems - the poor guy is literally allergic to them. But things start looking up for Yukinari when he accidentally plays peek-a-boo with the naked girl next-door. She freaks out and boots him in the face, magically transporting our hero to the coolest place ever: Seiren, a mystical land populated mostly by girls. As soon as he gets there, he meets Miharu, a super-bouncy, carefree cutie who can touch Yukinari without causing a rash!

Yukinari's got major girl problems - the poor guy is literally allergic to them. He can't even be in the same room as a girl without getting a rash. It's enough to put any red-blooded male in an awful mood. Things start looking up for Yukinari when he accidentally plays peek-a-boo with the naked girl next-door. He's magically Seiren, a mystical land populated mostly by girls. As soon as he gets there, he meets Miharu, a super-bouncy, carefree cutie who can touch Yukinari without causing a rash!

Yukinari Sasaki has extreme gynophobia - and an allergic reaction when girls touch him. He befriends an alien named Miharu, who comes from a planet that houses only women. Yukinari is able to touch Miharu without breaking into a sweat. He returns to his own world, accompanied by Miharu, but shortly thereafter, other girls follow them to his world... and his life turns into a one big mess.

Meet Risa, Fukuyama's younger sister and one dedicated troublemaker. To make matters worse, for Miharu at least, she believes that Yukinari is her "destiny." Risa will stop at nothing to jeopardize Miharu and Yukinari's relationship. Thankfully, the couple has insightful friends like Kirie to help undo Risa's mischief but will her efforts be enough against Risa's chaos?

You'd think the girls would have learned from Fukuyama's dirty old tricks, but apparently not. His movie-star good looks and charming disposition wins them over as they visit his house for some fun and games, one of which the girls won't be anticipating. Thankfully, they have their trustworthy and awkward Yukinari who decides the best way to go undetected by the male-phobic Fukuyama is to dress like a girl.

When Yukinari enters a contest to win an all-expenses-paid vacation to a tropical island, Miharu, Kirie and Koyomi get some extra-special cheerleading lessons from Fukuyama to pump Yukinari up! The teenage sleazeball has a few more lessons to dish out later: teaching our favorite alien girls a little Earth maid etiquette!