It's adapted from the original manga that targeted for male demography, there's no doubt the manga version is full of fan services drawing like erotic part of body Kotera-san. It's adapted by legend script anime writer Yoshida Reiko who responsible for anime like Silent Voice, Violet Evergarden, Aria series and some episode of Rorouni Kenshin. It looks like this is the first time when she write the script for live action. Like the previous of her works, this stuff seems more approach romance theme (human relation interest) than original creator intention.