Himeno has been featured in a fashion magazine! Could it be that she's working part-time as a model? Suspicion and wild ideas fill the minds of Nozomi and Kyoko, but what is the real story? Himeno's class visits a school for merfolk to participate in a joint class. The students of the two classes begin to build relationships as they interact throughout the day, but the highly unique merfolk students remain a source of intrigue.
it reduces the ratio of body 
mass to surface area,
،تقلّل نسبة كتلة الجسم إلى مساحة السطح
dann die Körperoberfläche gering ist
in Relation zum Körpergewicht
reduce el radio de masa corporal
a área de superficie
reduce el radio de masa corporal
a área de superficie
si riduce il rapporto tra la massa corporea
e l'area della superficie,
isso reduz a proporção de massa
corporal pra área da superfície,
так соотношение между массой и 
площадью поверхности тела меньше,