[Pre-serialization](https://www.webtoons.com/zh-hant/challenge/%E9%9A%94%E5%A3%81%E5%90%8C%E5%AD%B8%E6%98%AF%E4%BA%BA%E9%AD%9A/list?title_no=456748) [Original Webtoon](https://www.webtoons.com/zh-hant/drama/classmate-is-merman/list?title_no=3269)

Set in the period immediately after the collapse of the bubble economy, it depicts the events that occur on a "princess-like trip to London" by a slightly stubborn, elegant and cute grandmother and her granddaughter, Sawano. Caring for and protecting an elderly person on your own as a young person in your twenties is quite a difficult mission. However, Sawano also has one ulterior motive... (Source: Natalie, translated)

Included with the February 15th, 2013 inaugural issue of Harta. "Harta" means "treasure" in Indonesian. In this booklet, various creators followed the theme of "harta is treasure" to create one-page manga and illustrations. (Source: Harta, translated)

Rookie detective Asuka Takachiho of the Tokyo Metropolitan Police Department's First Investigation Division is assigned to a case where an editor is found stabbed to death. Together with Mari Dokushima, a popular mystery writer and detective skills instructor, she sets out to solve the case—but what will happen?