=Before I continue the book, here's a short passage of what happens in Saku, Mizu and Tsuyo's daily life. Enjoy.=

"I really wanna know what Nee-san's doing in there..she wouldn't let me in!!" Mizu pouted.
"Oh. Then we'll just- wait...I hear sounds coming from her room." Saku giggled. She opened the door a little, making enough space to perch her camera on the floor, recording a video of Tsuyo singing on her bed.
After 1 and a half hour of singing and recording, Tsuyo came out of her room, fuming.
"SAKUUU!!!!!!!" She screamed.

/timeskip to after Tsuyo has calmed down/

Saku and Mizu were on the sofa, while Tsuyo was taking a shower.
"Let's see what your camera got, Saku-chan." Mizu tried to hold back laughter. Saku played the video, and it shows Tsuyo sitting on her bed, headphones plugged in her phone and singing.

"Sainai boku to boku wa kakomu sekai de
Egaite mo tsukande mo mada tookute..."

Suddenly, Tsuyo came out of the bathroom, fuming again

"WHAT THE HELL-"