Please comment before purchasing as this item is also listed elsewhere. ★ Single item purchases are not allowed. I plan to lower the price to 680 yen, but if the price is already at that level, a combination will cost an additional 50 yen. The price is determined by occasionally searching for the book title and setting the price at +150 yen to +200 yen from the listed price of the book. Therefore, the price may be lowered or raised. ★ There is no price change for combining used books, including new releases, into a set. (If you wish to combine, please specify the title of the new release and write "I want to combine with the used ○○.") You can also choose one book from the 2-book 600 yen sale (excluding sets by the same author), but please "like" the book to make it easier to find. ★ For combinations from the page "Bundled, Available for Individual Sale, Combination with Sets Including New Releases," it's +40 yen. ★ For combinations from the 2023 release page, it's +100 yen. ★ For combinations from the 2024 release page, it's +200 yen. (In any case, combinations into sets of 800 yen or more will not change the price.) ★ For sets of new releases, the price for a set of new releases is a flat 1250 yen, including shipping, up to the set price of 800 yen. ★ Please do not ask for the price based on the above. If you want a new release set, I will immediately create a dedicated listing, so please purchase within 5 hours. ★ If you are unsure about which used book to combine, you can purchase first and choose by 2 days before the shipping deadline. Please check the applicable books below. There are people who check stock as a prank, so those with no transaction history or a single-digit transaction count must purchase within 2 hours of my response. Others, please purchase within 6 hours. (If you comment late at night, I will create a dedicated listing early in the morning, so please purchase immediately after waking up.) ★ The author's name in the title is a new release. ★ Important requests regarding transactions are written, so please check the profile and, after agreeing, write "[Profile checked]" and send a message after purchasing, even if it's just a single word. ★ For convenience store payments, please pay within 24 hours! ★ I get emotionally down when people decline after I calculate the price (T-T) ★ There are people who decline after inquiries, so please be sure to check the price yourself before commenting. After commenting, creating a dedicated page → immediate purchase is prohibited. ★ Returns are not accepted for any reason. ★ Price reduction requests are not accepted.