UPDTATED (July 7th): The title of single released on September 15th is ‘Day by day’.
Original source: https://www.universal-music.co.jp/jang-keunsuk/news/2021-06-23/
Jang Keun Suk’s new single ‘雨恋; pronounced Ama-goi’ that he wrote both music and words will be released on his birthday, August 4th (Wed). In addition, another new single ‘Day by day’ will be released on September 15th.
Some lottery events are planned with a serial number enclosed in each CD, as well as bonus items for buyers at specific record shops. For example, lucky 100 winners selected from each August-and-September buyers will get his voice message of your name. And, another lucky 100 winners will have a chance of personal online talk [voice call only] with JKS held on October 9th.
Furthermore, buyers who order the specific edition at UNIVERSAL MUSIC STORE and KOARI can join online talk events held on August 4th.
Details are as follows.