These Google Sheets functions can help you get infos from Melonbooks website.
Argument placeholders: url
=IMAGE(CONCAT("https:",IMPORTXML(IF(RIGHT(url,12)="adult_view=1", url, CONCAT(url,"&adult_view=1")),"(//figure[1]//img/@src)[1]")),1)
Argument placeholders: url
=IMPORTXML(IF(RIGHT(url,12)="adult_view=1", url, CONCAT(url,"&adult_view=1")),"//h1")
Argument placeholders: url
=VALUE(SUBSTITUTE(importxml(IF(RIGHT(url,12)="adult_view=1", url, CONCAT(url,"&adult_view=1")),"//span[contains(@class,'yen')]"),"¥",""))