Spoiled and arrogant!
How could Sogo Doma tolerate something like this? Did this stupid imouto think he would back down because of it? Impossible! He was a heartless savage, after all. A mere imouto... He smiled benevolently.
"Umaru, it'd be one thing if someone else said it, but have you forgotten? You were the one who handed me the antidote to the hair wax!"
"Eh?" Suspended in midair, Umaru Doma froze for a moment before rubbing her chin. "That does seem to be the case!"
"Don't pretend you've got selective amnesia..." Sogo Doma retorted.
"Whether it's an antidote or not isn't important anymore..." Umaru Doma waved a hand. "What matters is that Umaru never wanted Onii-chan to help wash her hair!"
"Tsk, tsk..." Sogo Doma wore an evil smile. "Umaru, Onii-chan will help you remember..."
"Wait..." The siblings' conversation baffled Utaha Kasumigaoka once more. "There's an antidote for hair wax that makes people lose their hair?" She read plenty—did they think they could fool her? Didn't hair loss require damaging the hair roots first? That could be reversed too?
"Why not?" The Doma siblings simultaneously gave her puzzled looks. Sogo Doma explained, "The prerequisite for hair loss is contact with water. In other words, water is an additional condition for the hair loss. Only when water combines with the hair wax does it cause the chemical reaction that makes hair fall out. As long as the hair wax's components are neutralized beforehand and it can no longer react chemically with water..."
Utaha Kasumigaoka: "..."
That... worked too!? Was this what one should expect from the siblings who had swept first place in both freshman and sophomore year? Sorry, she shouldn't have claimed she read a lot just now. The her who had made a bet with Sogo-kun back then had