Shigofumi: Letters from the Departed Concepts

Betrayal is the act of treachery or a violation of a trust or allegiance. This can be to one's friends, country, or God.

A bully is a person who habitually badgers and intimidates smaller or weaker people.

Child Abuse is the act of an adult striking or causing harm to a child. Not necessarily physical, but emotional abuse as well.There are also adults who sexually abuse kids called Pedophilia.

The character has known the protagonist for a long time, typically all his/her life. If he/she's from the opposite gender there's a high chance he/she has a crush on the main character.

A list of gay anime characters.

A list of lesbians that appear in anime and manga.

The act of taking another person's life.

When someone returns an cruel favor to another after what has been done to them or an loved one.

Suicide is the act of taking ones own life through various means.

Tennis is a sport played on a normally green court separated into two halves by a waist high net. It is played with Tennis Rackets and a Tennis Ball. Played between two to four players at a time.

A passion or romance for a person where these feelings are not returned by the object of affection. A one-sided love.