Searching For Himawari Wa Yoru Ni Saku Inall -

Not a mainstream licensed manga/anime/novel. Likely:

“I spent three years searching for himawari wa yoru ni saku inall. Finally found it on a Russian VK archive. It’s a 15-minute kinetic novel made in Ren’Py. I’ll upload screenshots tomorrow.” — , Twitter (account now suspended) searching for himawari wa yoru ni saku inall