Wow, just wow! This is not only a great visual novel, but I could see my native language in it. Very beautiful work of the artist, smooth animation and a well-built plot! Only sometimes the characters jump from the informal "ты" to the formal "вы" and this sometimes causes confusion. (Russian pronouns). Please continue your project! Hello from Russia!
(* ^ ω ^)／
P.S. Nikolai is a great name.