Since I don't have detailed knowledge of this specific visual novel, it's difficult to say precisely. However, from the title, it seems that it has a connection to a son's friend. It might tell a story full of drama, with the relationship between different characters evolving as the story progresses. There could be emotional moments, conflicts, or revelations that are centered around the situation of being 'okasarete' (entrusted) to the son's friend.
The title suggests that the son and his friend are key characters. The son is a part of the equation as it's his friend involved. There may also be a parental figure who is doing the entrusting. Without more information, it's hard to say who else might be a main character, but it could be someone from the son or his friend's social circle who gets drawn into the situation.
Hard to say. It could be on hiatus, but without concrete information, it's difficult to give a definite answer. Try following the mangaka's social media or the manga's official website for the latest.