The phrase boku ga mamorunda translates from Japanese as I will protect them, a classic declaration for shonen heroes facing a stronger enemy. The exact source of this recording is not widely documented, so it circulates mainly as a standalone anime voice clip on soundboards and in fan edits. Its short length and clear two part delivery make it easy to drop over any character, pet or object being defended for comic or dramatic effect, which is why it keeps appearing in short form videos and meme compilations.