Mother embraced by her daughter's boyfriend

Chika is looking forward to seeing her only daughter Yoko bring her boyfriend to her house for the first time today. Chika then pats her heart at the sincere personality of Yoko's boyfriend Atsushi, who she first met... "I don't have a mother, so I'm sorry I'm not used to the homely atmosphere..." Chika listened to Atsushi's story, but she hadn't known about it at the time. What makes Atsushi's feelings for Chika more than her "lovers' mother"...