1x10 - I'll Live a Long Life to Dote on My Favorite Stepbrother!

Alba enters a mysterious botanical garden that has appeared in his home's garden and discovers the same plant he found in the cave. It is revealed that this plant possesses the ability to store magical power. To investigate its properties, Hals invites his friend, Marquis Valt, and his son Bruno—a love interest in the dating sim—to the mansion.