Teacher Misaki, fused with Aqualady, is attacked by the Gilliam alien while protecting Ozaki, a student attending remedial classes before a school trip. Upon discovering Misaki is Aqualady, the enemy forces her to ●○■★ to protect Ozaki, then flees immediately afterward. The next day, the students depart safely for their trip, but Misaki remains at school, sensing the emergence of a monster. Transforming into Aqualady, she confronts the threat but faces two monsters at once, putting her in grave danger. At that moment, the students' bus becomes stranded, and Misaki shields them, leaving her completely defenseless. To make matters worse, the Gilliam alien from the previous day returns, bringing a new crisis. Can Misaki successfully protect the city?! [BAD END]