A long version of YOU + I = ❤ - short ver -, titled YOU+I=❤ (辻 魁斗センター ver.), can be found on 3 Majesty's Royal Trinity single.
A karaoke version of the song, titled YOU+I=❤ (辻 魁斗センター ver. Instrumental), can also be found on the same single.
Trivia
YOU + I = ❤ - short ver - originates from the KONAMI dating simulation game Tokimeki Restaurant☆☆☆ (ときめきレストラン☆☆☆).
In ポップンリズミン, YOU + I = ❤ - short ver -'s title is shown as YOU+I=♥.
Difficulty & Notecounts
jubeat to clan difficulty rated from 1 to 10.
REFLEC BEAT to groovin'!! Upper difficulty rated from 1 to 10+, and from 1 to 13 in VOLZZA/VOLZZA 2.
ポップンリズミン difficulty rated from 1 to 10.