楽しくなる

become enjoyable

→ 楽しい
phrase Rare #26,613
become enjoyable Describes something becoming more fun or enjoyable, or someone starting to enjoy something. Often translated as “start to have fun” depending on context.
JA: 友達が来たら、もっと楽しくなるよ。
EN: It’ll become even more fun when our friends arrive.

その事を考えただけで楽しくなる

Just thinking about it makes me happy.

今日はきっと楽しくなると思っていた

I thought today would surely be fun.

一度殺す殺し楽しくなる

Once you kill someone, killing becomes fun.

きっと楽しくなるわよ

It’s sure to be fun.

— ダンガル きっと、つよくなる (2016)