Mizuki dreamed of a peaceful high school life... but now that she has joined the "Hero Club" led by Noda-kun, she is being swept away by their delusions and antics!? The Hero Club is still on the rampage with the addition of a new member!! Simultaneously included: "Chuubyou Gekihatsu Boy NEO - Physical education festival edition" (newly-drawn).

Treasure Hunters - Adventurers who search for buried treasure scattered around the world. In Shinjuku, Tokyo, a young man appears as a transfer student at Kamiyoshi Academy. While he seems like a normal student, he is actually a treasure hunter. His mission is to discover a mysterious ruin hidden deep beneath the school. Accompanied by his new friends from school, he sets out to discover the mysteries of a super ancient civilization. However, numerous traps, monsters called "Kehito" that lurk within the ruins, and the clutches of the "student council" stand in his way! (Source: Arc System Works)