Kanade attends school in the daytime. When school’s out she can do other actions: research jobs, work at them, rest at home…there are many ways to spend time. Kanade has only so much stamina each day. If she has none, she must rest a day. If Kanade abandons her sense of guilt, there are ecchi part-time jobs available too…
Keeping all this in mind, happy earning and good luck!