The accompanying music video for the song was uploaded onto 1theK's YouTube channel simultaneously with the single's release.

To promote the single, the group performed on several South Korean music show programs, such as M Countdown and Inkigayo.

[15] The Kraze Magazine called the song "a burst of energy and full of happiness."

While the EDM version was described as "the perfect way to welcome the summer months", and that it has a "powerful fun club vibe.

"[16] WhatTheKpop described the track as "upbeat and sweet", and it "expresses the innocent confession of a young lady.

"[18] The music video for "Wonderful Love" was uploaded to 1theK's official YouTube channel on April 26, 2017, in conjunction with the release of the single.

[20] Seoul Beats stated the video is "cute without being cutesy" and that it "leans towards obvious spring visual influences.

[22] In October 2017, the song was performed in Global K-Pop Super Concert in Daejeon.