The Visitor summary:

This manga contains four stories:- Houmonsha / The VisitorA prequel to Thomas' Heart narrating the earlier life of Oscar. Due to many large and small problems that have added up over the years, Oscar's parents' marriage is collapsing. One day, after a fight that Oscar believes is going to end like all of the others, his father does something irreversible. Now Oscar and his father will have to deal with the consequences.- CastleA boy wondered how to build his castle.- Egg Stand translated in French under the name ''Le coquetier'' in Moto Hagio Anthologie De l'humain- Angel Mimic