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'm sure that Adachi could never even imagine
Wenn Adachi wüsste, dass ihre Mutter
De seguro Adachi jamás se imaginaría
Seguro que Adachi ni se imagina
Adachi ne s’imaginerait jamais
Sono certa che Adachi non potrebbe mai immaginare,
Certamente a Adachi não imagina
Адати даже не подозревает,