Ah, good heavens....it has been a long time since I put up a Reimy（麗美）article. A couple that I did do last year had their videos eliminated so they're unfortunately on Draft status, but I'm happy to see this particular song up right now.
I've known Reimy primarily as a singer-songwriter of the turn of the decade between the 1980s and 1990s but "Koi Suru Jikan" (Time To Love) was her 7th single much earlier in her career when she was a young pop singer (aidoru perhaps?) covering a number of Yuming（ユーミン）hits. However, this song was actually created by Etsuko Kisugi（来生えつこ）and Kyohei Tsutsumi（筒美京平）for release in November 1986 as a theme tune for a Saturday-night NTV drama titled "Koi Suru Jikan desu"（恋する時間です...It's Time To Love）which starred Narumi Yasuda（安田成美）and Miki Imai（今井美樹）among other thespians.
"Koi Suru Jikan" is a pretty tune with Reimy singing about wishing that falling in love wouldn't be so messy and that she would like the Disney version (i.e. unrealistic) of things. Good luck on that. Tsutsumi's music rather reflects Kisugi's lyrics as it weaves between uncertainty and hope for a happy resolution to the romance.