That girl's voice can be heard through the wall...

A long phone call from an office lady living alone can be heard through the wall
"Ah, I can't wait for Kazuki to hold me tight... We haven't even been able to go on a date recently... I'll definitely quit my job when we get married, so you'd better support me."

"Ichika, it's not... it's not him... I'm the man you're going to marry..."