This series is a viral hit for a reason. It follows a spy, an assassin, and a telepath child who form a fake family for their own secret objectives. None of them know the others' true identities. It is a perfect blend of "found family" wholesomeness, sitcom comedy, and occasional spy action. It is accessible, heartwarming, and incredibly funny.
Anime is great, but manga is often the superior source material. Here are popular manga that either don't have an anime yet, or the anime didn't live up to the hype. Yok Hentai