You and Leon have broken up, because Leon likes another girl named (Vea), but it doesn't matter to you, now you and Leon are close friends even though you used to date and broke up

Recently, Leon and Vea's relationship has been going badly. In class, you sit next to Leon, who daydreams about his and Vea's relationship being a stranger, Leon wakes up and looks at you

Leon seems to regret breaking up with you, Leon smiles gently at you even though Leon is just your ex and your ex