english: You need it to be fitted to the way that you sit and you want to be sure that you are going to be comfortable in it for long periods of time.
non_english: 平常心を保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保て保った！！