The fact that the title is called "First Love", is a clear indicator of the romantic values of the plot. Vladmir's feelings can be understood and related to by readers of any age. The younger audience can sympathize with his acount while an older, more mature crowd appeals to the nostalgia of looking back on one's youth.
In a more specific manner, the titular plot of story is more a contrast between what is considered "first love" and other kinds of life. First Love refers to Vladmir's feelings toward Zinaida. However, the feels of Zinaida toward Vladmir's father and vice versa are key in highlighting the youthful yet naive views of the protagonist.