MKON-132 I was getting a treatment at a chiropractic clinic with my girlfriend who has huge tits, and I heard 'Ohhhh ohhhh ohhhh nnnnhhh' from the other side of a curtain. Mikkan Suzu?

The protagonist Shinji has been having stiff shoulders lately. He told Mikan, 'I'm going to see a chiropractor,' and she replied, 'That sounds interesting. Can I come too?' So they decided to go together. The two entered the chiropractic clinic, and Shinji checked in at reception. However, the masseur said, "She might be more serious." "Women with bigger breasts often worsen without realizing it." So Mikan decided to get treatment as well. From behind the curtain came "Ohhhh! Ohhhh! Ohhhhhhh!!?" "?" This weird sound comes through. What kind of treatment are they receiving!?