SCANDAL singing and performing Shunkan Sentimental. Watch the video, listen to the music and enjoy. Fullmetal Alchemist also features this song. Following information has been related from the Wikipedia:

[“Shunkan Sentimental” (瞬間センチメンタル) is the fifth major single (eighth overall) released by Japanese pop rock band Scandal. The title track was used as the fourth ending theme of the anime Fullmetal Alchemist: Brotherhood.[1] The single was released in two versions: a limited edition that was housed in a Fullmetal Alchemist: Brotherhood cardboard jacket and came with a bonus track, and a regular edition with a first press consisting of an alternate cover, a special Scandal booklet, and a Brotherhood sticker. The second B-side, “Yumemiru Koro wo Sugitemo”, is a cover of Hillbilly Bops’ song of the same name, which was the answered song of their previous single, “Yumemiru Tsubasa“. The single reached #7 on the Oricon weekly chart and charted for thirteen weeks, selling 32,624 copies.[1] It was certified platinum by the RIAJ for selling over 250,000 digital copies in January 2016.[2]]

Track listing:

Normal edition (ESCL-3381)
No. Title Lyrics Music Length
1. “Shunkan Sentimental” (瞬間センチメンタル; Sentimental Moment) Scandal, Natsumi Kobayashi Yuichi Tajika 3:45
2. “Hoshi no Furu Yoru ni” (星の降る夜に; In the Night of Falling Stars) Scandal Yuichi Tajika 4:03
3. “Yumemiru Koro wo Sugitemo” (夢見る頃を過ぎても; Even If the Time to Dream Has Passed) (Hillbilly Bops cover) Chiroru Yaho Sachio Kubota 4:17
4. “Shunkan Sentimental (Instrumental)” (瞬間センチメンタル) Yuichi Tajika 3:46
Total length: 15:51
Limited edition (ESCL-3380)
No. Title Lyrics Music Length
1. “Shunkan Sentimental” (瞬間センチメンタル; Sentimental Moment) Scandal, Natsumi Kobayashi Yuichi Tajika 3:45
2. “Hoshi no Furu Yoru ni” (星の降る夜に; In the Night of Falling Stars) Scandal Yuichi Tajika 4:03
3. “Yumemiru Koro wo Sugitemo” (夢見る頃を過ぎても; Even If the Time to Dream Has Passed) (Hillbilly Bops cover) Chiroru Yaho Sachio Kubota 4:17
4. “Sunkan Sentimental (Fullmetal Alchemist: Brotherhood ED ver.)” (瞬間センチメンタル) Scandal, Natsumi Kobayashi Yuichi Tajika 1:31
5. “Shunkan Sentimental (Instrumental)” (瞬間センチメンタル) Yuichi Tajika 3:46
Total length: 17:22
Qualified Hafiza Online Corporate Advisory