Thanks for the chapter!
Hopefully the MC's father is able to improve things before the MC's crushed under the mental fatigue or he'll never find any time to do anything else. And if he thinks it's bad now, wait until Frey joins in. 😄
Dude, if becoming close to a chunni is how you can live up to your lil sis and her thinking of you as the coolest guy in the world then you do it. Even if it means dying of shame internally.