[Reservations Open] Sumanaisensei x Dangerous Creatures! "Too Dangerous to Be Sorry! Sumanaisensei's Dangerous Creature Survival Classroom" Released on Friday, May 29!

April 8, 2026

This book, "Too Dangerous to Be Sorry! Sumanaisensei's Dangerous Creature Survival Classroom," features Sumanaisensei and the members of Sumanaischool from the popular YouTube channel 'Water Challenge' on a mission to capture dangerous creatures. It combines manga and an illustrated guide to teach children about the ecology of over 100 different creatures. Exclusive bonus sticker seals are available with purchases from select bookstores and Rakuten Books.

product_launchNQ 100/100出典：PR Times

📋 Article Processing Timeline

📰 Published: April 8, 2026 at 19:00
🔍 Collected: April 8, 2026 at 10:31
🤖 AI Analyzed: April 18, 2026 at 13:56 (243h 24m after Collected)

With over 3.97 million total followers! The members of Sumanaisensei & Sumanaischool from the highly popular YouTube channel "Water Challenge," loved by children, take on a dangerous creature capture mission! This book is a fun way to learn about the ecology of dangerous creatures through manga and an illustrated guide.

● Learn about the ecology of dangerous creatures while having fun with Sumanaisensei and his team!

In this book, the members of Sumanaischool take on a mission to capture dangerous creatures that have wandered into Sumanaisensei's world. Over 100 different dangerous creatures appear, from powerful terrestrial creatures like lions and tigers, to venomous creatures like king cobras and giant toads, as well as marine and freshwater creatures like sharks and electric eels.

With exciting stories and a photo-illustrated guide, this content is full of engaging material. You can learn about the ecology of dangerous creatures while enjoying the interactions between Sumanaisensei and the Sumanaischool members.

● Exclusive bonuses available only at bookstores nationwide & Rakuten Books!

Those who purchase this new work, "Too Dangerous to Be Sorry! Sumanaisensei's Dangerous Creature Survival Classroom," at Miraiya Shoten stores nationwide, Kinokuniya bookstores (at participating stores only), or Rakuten Books will receive an exclusive bonus sticker seal!

Furthermore, a campaign will be held where those who purchase Seitosha's Sumanaisensei series, including the previously published "Too Interesting to Be Sorry! Sumanaisensei's Riddle Book," at participating bookstores nationwide will receive an exclusive postcard as a gift.

*Participating stores will be announced at a later date.

● What are "Sumanaisensei" and "Water Challenge"?

"Sumanaisensei," who appears in this book, is the main character of the YouTube channel "Water Challenge," which delivers various content centered around the popular game "Minecraft." With the catchphrase "Sumanaiiiiii!", their adventures and comedic developments with the unique members of "Sumanaischool" are hugely popular with children.