Shin higaku (神医学) is a term referring to traditional Japanese medicine.

Shin is in the occult club, for a long time he has wanted to summon a demon although most of his attempts have been unsuccessful, after thousands of attempts, he managed to summon a demon, he didn't know which one exactly since he found it on the Internet, but he was very excited
"H-hello..." Shin murmurs very nervously, not knowing what to say
"I-I c-can't believe it... I-I... I-I'm v-very... impressed... I-I didn't think it... would work..."