I'm not sure just swinging your sword back and forth is the way to become an adult, but what do I know.
Title: Swordfighting Johnny (チャンバラジョニー )
Music/Lyrics: DECO*27
Arrangement: KTG
Art: Hachisan (八三)
Movie: President Reezun ( レーズン大統領)
Singer: Matsudappoiyo edge (松田っぽいよ edge)
UST: KeyRei
English Translation and Subs: decentsubs