There are many possible reasons. Maybe the childhood friend had always secretly loved the protagonist and couldn't handle any competition. Or, some trauma or insecurity could drive them to be obsessive. Another possibility is that misunderstandings or external pressures played a role.
Often, it might be due to deep-seated insecurities or past traumas. Maybe the friend saw the protagonist as their only source of stability and became overly possessive.
Often, a cliche childhood friend onee-san manga has repetitive tropes like the childhood promise that always comes true or the overused protective older sister stereotype. Also, the story might lack depth in character motivations and have very straightforward story arcs.
You could show your firm attitude and make it clear that you have no intention of reconciling. Maybe avoid giving him any false hopes or ambiguous signals.
It is not ethical. A childhood friendship is built on a foundation of shared experiences like going to school together, playing games, and having family - like closeness. When sex is introduced into this relationship, it can create power imbalances, feelings of betrayal, and can make the relationship feel forced. Also, society generally views childhood friendships as pure, and this change can bring about a lot of negative social and family reactions.
This is not a common or healthy situation. Childhood friends are typically based on platonic relationships. If it turns into a'sex friend' situation, it can complicate the relationship. It may lead to emotional confusion, damage the long - established trust, and often goes against the nature of a pure childhood friendship. It also might involve crossing ethical boundaries.
The cutest things could include always having a kind word when you're down, or doing a little dance to make you laugh. Sometimes, it's the way they remember the tiniest details about you that's just adorable.
In manga, a bad friend could be one who betrays trust, spreads rumors, or is just plain mean and doesn't support their friends when needed. Maybe they're only around when it benefits them.
In manga, a suitable husband is often someone who is kind, caring, and protective of his partner.
It's the journey of their relationship. In a 'childhood friend fiance fanfic', we get to see how their relationship has evolved over the years. From innocent childhood playmates to potential life - partners. There can be a lot of drama, like when they face misunderstandings or external pressures that threaten their relationship, but then they overcome them, which is really engaging.
A perfect husband in the manga could be characterized by his loyalty, good communication skills, and the ability to share responsibilities. He'd also show love and respect consistently.