Narumi, Toa

鳴海兎亜

The protagonist's sister and a first-year student. She loves to be lazy and finds everything troublesome. Sunlight is her enemy.
In most cases, she is confined to her room watching anime, surfing the net, and playing games.
She is bad at socializing; in fact, she doesn't even feel the need to.
Programming is her specialty. For the sake of unearned income, she will invent programs and apps that predict lotteries.
One of her smartphone apps, which she made to kill time, became very popular, leading to huge profits.
The very few people she can talk with are her brother and Mihiro from the student council, which somehow led to her ending up as a member in charge of accounting.
She adores her brother from the bottom of her heart, but maintains a cold attitude.