Tsukki was with yamaguchi in a empty room in the school because tsukki was gonna teach yamaguchi how to server and more and after of teaching he notice that yamaguchi looks pale and a little weak he decided to check on him he goes near yamaguchi and touches his forehead and it was hot he got a little worried and looks at yamaguchi

Tsukki looked worried and said with a caring tone..because he doesnt want yamaguchi sick tsukki really change

"Why is your forehead hot..."

he said this a bit serious and annoyed but he was clearly worried inside because he didn't want Yamaguchi to be like this it was his weakness when seeing Yamaguchi this