Grand Blue Dreaming

When Iori Kitahara heads off to college, he decides to live at his uncles dive shop in Izu. Iori is looking forward to experiencing college life, but ends up running into a group of tough guys playing strip rock-paper-scissors. Iori gets dragged into the diving clubs crazy shenanigans and ends up spending his first day in college wearing nothing but a pair of underwear.

Iori and Kohei don wetsuits and head to the sea! Although Iori used to be afraid of the water, he starts becoming more interested. But diving equipment is expensive! Tokita and Kotobuki decide to hold a mens beauty pageant for the Izu Spring Festival in May. The guys want to avoid being paraded around on stage, so they try to get Chisa to participate in a womens beauty pageant.

Iori and Kohei attend class in their underwear like normal, but everyone glares at them with a bloodthirsty look in their eyes! Its because they heard that Iori and Chisa are dating! Sensing their lives are in danger, Iori and Kohei offer to setup a mixer. They ask Azusa to introduce her friends, but she brings Aina Yoshiwara, the "Cakey" girl from the Izu Spring Festival!

Iori and the others dream about going diving at a beautiful location after seeing an article on Miyakojima in a magazine. However, Tokita and Kotobuki decide the club is going to join a tennis doubles match! They explain that theyre joining the match to get everyone to build trust with their diving buddy, but the real reason is to get back at the tennis club and take away their prize money!

Iori tries to setup another mixer for his friends, and wants to ask Chisa to introduce her friends so they can all play truth or dare. Nanaka and Azusa also get involved, and they all begin a vicious game of attack and defense! However, Iori doesnt have enough money for their trip. Iori and the gang head to a diving shop to buy diving gear, but find out theres still a lot they dont know.

"You might be the only one who cant pass the license test," Nanaka says to Iori, pointing out what hes bad at. To avoid being made fun of by Kohei and Nanaka, he practices secretly. Yet, while practice, all he thinks of is how to poison them at dinner. He avoids being pairs with Kohei and Aina and gets Chisa to promise to help him with practice. But, these interactions cause misunderstandings...

Iori receives a letter from his little sister back home. Note: This is still a diving anime.

Aina is out of control! But why?

Iori and Kohei attend the All-Girls College Festiva, but the girls ask them to help out at the cafe.

Iori and his class need to cooperate and do a very dangerous experiment together.

All sorts of misunderstandings ensue as attraction comes into the equation.