Well, I really like the ending and was very wholesome. The are no toxic relationship as you proceed reading the story. Though, the only flaw is that the title doesn't fit the manga as much. The "childhood friend" image doesn't fit him as much. He's a classmate but not a typical "childhood friend" you played with when you were a young child. They've only known each other probably ever since as middle schoolers. About the stalker stuff, it was only shown once and no longer fit to that category as the story continues. Another thing is I'm kinda annoyed with the "QC" comments like they are saying "are u announcing ur d!ck?". I personally think it's not entirely a bad thing to still ask for a consent to "put it in" as it shows respect to the lady. That's all I have to say.
Dekiai Osananajimi wa Watashi no Otto de Stalker!?