LINE HELLO BT21 Season 2 is a fun and exciting puzzle game developed by LINE Corporation for Android devices. The game is a continuation of the story of the BT21 members who are trying to achieve Universtardom. However, their town has been messed up by the Popomons, and they need to clean it up. The game consists of various stages with different obstacles such as milk, boxes, ice, and slimes.

The gameplay is easy and playable with one hand. You have to throw bubbles and line up three of the same type to pop them. You can also match four bubbles to create explosive bubbles that match the type of bubble. The cute BT21 characters have skills that can help you in the stages. You need to complete the missions by collecting story keys and clearing story missions to clean up the town. The game has a town feature where you can clear story missions and decorate your own wonderful town.

LINE HELLO BT21 Season 2 is recommended for anyone who likes BT21, thrilling puzzle games, LINE games, shooting puzzle games, and games that have towns, houses, and gardens that you can fix and decorate. It's a simple and easy-to-play shooting puzzle game that you can enjoy with your friends.