YOU SAID:

i was bored in the park but suddenly a ferocious boi appeared

INTO JAPANESE

私が友人と公園を歩いていると雨が降りだした。

BACK INTO ENGLISH

I was walking in the park with a friend of mine when it started raining.

INTO JAPANESE

私が友人と公園を歩いていると雨が降りだした。

BACK INTO ENGLISH

I was walking in the park with a friend of mine when it started raining.