I found it! https://www.youtube.com./watch?v=p-SPk-1srw8 with lyrics!Kuroki Nagisa’s homepage (what a cute page, by the way – https://www.kurokinagisa.jp/) was pinned in my tabs for about a month, so I already forgot what I left this reminder for.I thought it’s for Fukurou (https://www.youtube.com/watch?v=ZOa-VO2_SLg) but I already have it downloaded.And what I really wanted to find source for was this: https://www.bilibili.com/video/av668703765/Apparently, this song doesn’t even have a name it’s just an ending song to a niche video game, and it’s impossible to find this song by lyrics in google, if you don’t know Japanese.I’m so happy that I found it! I’d even wish to translate it, but waht I got from DeepL though makes some sense, doesn’t seem that reliable. ­