Teacher! It's Spring (春だよ！高校教師, Haruda yo! Kōkō kyōshi, It's spring!) is the April event in The Battle Cats.
During this event, a new enemy unit appears: Teacher A.! And if any player clears any of the stages during this event, a new cat unit only available during this event: Maiden Cat, can be unlocked by chance. The further you progress through the levels, the higher your chances of unlocking the cat unit increase. The player can get the unit with a 100% chance in any of the stages using a Treasure Radar, which can be purchased at any time in the Shop menu.
- 2★ difficulty for this event multiplies enemy strength magnifications by 150%.
- 3★ difficulty for this event multiplies enemy strength magnifications by 200%.
- 4★ difficulty for this event multiplies enemy strength magnifications by 300% and only allows Special Cats and Rare Cats to be deployed.
|English Version||Japanese Version||Translation|
|Stage 1||Cat School Musical||春の始まり (Haru no Hajimari)||The beginning of spring|
|Stage 2||I can feel it||瞳で感じる恋心 (Hitomi de Kanjiru Koigokoro||Love felt in the eyes|
|Stage 3||The Catbook||秒速５センチメンタル (Byōsoku Go Senchi Mentaru)||5 centimeters per second|
|Stage 4||P.S Cat Loves You||私の恋愛通信簿 (Watashi no Renai Tsūshinbo)||My love report card|
|Stage 5||100 Cat Dates||愛情の裏返し (Aijō no Uragaeshi)||Inside out of love|
|Stage 6||Lament||慟哭 (Dōkoku)||Shrieking|
|Stage 7||I L U||やっぱ☆DA・I・SU・KI (Yappa ☆ DA I SU KI)||After all ☆ DA ・ I ・ SU ・ KI|
|Stage 8||Let's Start Over||はじめよう恋の詩 (Hajimeyō Koi no Shi)||Let's get started love poems|
- June 22nd, 2015 to June 25th, 2015
- March 1st, 2015 (Delayed to March 2, 2015. Officially started at 11 AM), to March 31st, 2015
- August 11st, 2014
- April 1st, 2014 to April 30nd, 2014