Shimamura just happens to run into Adachi's mom at the gym and they have an awkward encounter. Later on, Shimamura invites Adachi to karaoke with Hino and Nagafuji.
I don't like singing in front of people.
Allein vor anderen zu singen,
liegt mir nicht so.
No me gusta cantar frente a la gente.
No me gusta cantar 
delante de los demás.
Je suis pas à l’aise
quand on me regarde.
Non mi piace cantare di fronte alla gente.
Eu não gosto de cantar
na frente dos outros.
Я боюсь петь у всех на глазах.