If you're looking for anime similar to Infinite Stratos: Official Anthology Comic, you might like these titles.
"Hundred" - the only weapon capable of fighting the Savages, mysterious life forms attacking Earth. Hayato enters the battleship university Little Garden in hopes of becoming a Slayer... but his roommate Emile Crossfode, who seems to know a lot about him for some reason, awakens a sort of unsettling nostalgia within him. What's more, right after he joins the school, the strongest Slayer at Little Garden, the "Queen" Claire Harvey, challenges him to a duel!
From the broken, charred pieces of the Arcadia Empire, a new kingdom arose. To protect itself from future foes, the new Kingdom of Atismata began training Drag-Knights to wield ancient mechanical dragons known as Drag-Rides. When Lux Arcadia, former prince of the ruined Empire, sights the new kingdom’s princess, Lisesharte Atismata, naked, she challenges him to a Drag-Ride duel, beginning an odd chain reaction that will expose the dark secrets of both royal families.
Shungo is an extraordinary high school student; in addition to his studies, he’s been trained by his mercenary sister to be a top mercenary. Their newest task involves the Tsukimura siblings; both of them have the powers of a succubus, but Mayu has a slight problem: she suffers from androphobia – a fear of men! Shungo’s new objective is to help Mayu overcome this phobia and protect her from the men her succubus powers naturally draw to her; but this becomes more difficult once he becomes the guinea pig for social experiments involving Mayu, such as sharing the same bed and even bathing together! To make matters worse, the ever-growing popularity of Mayu at school and the student council president’s infatuation with Shungo only add to his workload!
The story is set on July 7. "In the midst of the Tanabata festival celebrations, Shido meets Kurumi, the worst Spirit. And the couple's destination is … a wedding ceremony hall!?"
The team has come to the pool of a luxury hotel to do research for a swimsuit event for their game. As always, Utaha and Eriri are fighting, Michiru is doing her own thing, and of course Megumi is being aloof.