Mafuyu no Shukuchoku-shitsu de Asedaku Ecchi: Hokahoka Yutanpo JK Ikaga desu ka?

"It's too hot already…!!" A flushed body trembling at every touch… Made to come again and again to the point of feeling dizzy from the heat in a freezing cold night-duty room...
(Source: Coolmic)
Note: Originally serialized as a web manga under the same name with each chapter split into 3 ‘episodes’, resulting in a total of 27 episodes.