Pink Methuselah / Gutto Kuru SUMMER

 is the fourth single by Oomori Seiko. It was released on August 24, 2016, and peaked at #51 on the Oricon singles chart.

CD

 * 1) Pink Methuselah (ピンクメトセラ)
 * 2) Gutto Kuru SUMMER (勹″ッと<るSUMMER)
 * 3) Wedding Bell (ウエディング・ベル) (Sugar cover)

DVD

 * 1) Pink Methuselah (Music Clip)
 * 2) Gutto Kuru SUMMER (Music Clip)
 * 3) Wedding Bell (Music Clip)