20 Sweet 2021 January ISBN 978-4-86701-188-1 on sale 2020.12.20 1800 yen+tax

[the following only contains seiyuu information]

This is a large (bigger than a4), thick and heavy book, containing photo collections and interviews of 10 idols, who are 20 years old.

This is part of the BLT series. The paper on the inside is not as thick as the paper used in the BLT magazine or BLT Graph books.

There are over 200 pages in the book, and there are 20 pages for each idol. 16 of them are color photos and 3 of them are interviews. There are kimono and dress photos of everyone.

One of the featured idols is Kurusu Rin (来栖りん) from the idol group 26ji no Masquerade. There are 9 pages of kimono photos and 7 pages of Rin wearing a white dress.