キミは“見ていたね”？ (Kimi wa 'Miteita ne'?, "You Saw It, Didn't You?") is a cross-series port from ONGEKI R.E.D., bringing a narrative-driven duet into the maimai DX song library. The track was composed by the duo of Shinozaki Ayato (篠崎あやと) and Tachibana Ryosuke (橘亮祐), who have contributed extensively to Sega's rhythm game catalog. The vocals are performed in-character by Yuuki Riku (CV: Asahina Maruka) and Shinonome Tsumugi (CV: Izumi Fūka), two ONGEKI characters whose personalities drive the song's playful back-and-forth dynamic. In its source game, the track is classified under the genre "探偵ポップス" (Detective Pops), a label that reflects Tsumugi's detective motif and the song's interrogation-like title. It originally appeared as part of ONGEKI's event chapter "東雲つむぎの事件簿" (Shinonome Tsumugi's Case File), establishing its role as a character-centric piece tied to Tsumugi's storyline. The translated title, phrased as a question accusing the listener of having witnessed something, reinforces this mystery-themed framing. The song arrived in maimai DX with the CiRCLE PLUS update on April 1, 2026, categorized under the オンゲキ＆CHUNITHM cross-series genre. Its four DX charts span Basic (level 3), Advanced (level 6), Expert (level 10, designed by はっぴー), and Master (level 13.1, designed by サファ太). Notably, the Expert chart employs zero Touch notes, creating a distinctive gap in note-type composition between it and the Master chart, which makes heavy use of Touch (63) and Break (77) notes across its 655 total note count.