Official Site

Release date: August 27, 2021
Alt name: 雨の痕外伝3 欲しいのはキミだけ
Age: R18
Publisher: Snowdrops
Scenario: Hiyo
Illustration: Hakuseki
CV: Tetrapot Noboru (Furukawa Makoto)

Download: mediafire
Pass: discord (check FAQ)

Tracklist:
1.儚き夢の夜
2.罪深き花
3.密かごと
4.揺らめく紅
5.鎖された庭
6.出演紹介/クレジット
Animate and Pokedora R Tokuten
舌の上で溶ける悪戯 (18:21)
Stellaworth and Stellaplayer Tokuten
雪の上に散る紅 (17:01)

About track 6: Title is listed differently on Stella (as クレジット) and Pokedora (as 出演紹介) but it’s the same track where character is introducing himself. Do note that it is not available on DLsite (or it is, but it isn’t listed on info page).
It’s basically hidden track on physical CD.