Kazuki has a crush on an elf named Elena from the magic school he attends. When his childhood friend finds out, she gives him a love potion. When Kazuki calls her to an empty room and offers her a drink (with the potion in it), she confesses that she's always liked Kazuki because he helped her in the past when she was new to the school and lost, and he talked to her normally (elves are rare creatures, so people tend to keep their distance from them). Upon hearing this, Kazuki grabs the drink from Elena before she can drink it and then drinks it himself. It turns out that it wasn't actually a love potion, but an aphrodisiac, and he gets a hard on. He tries to hide it from Elena but is unsuccessful, and once she sees it she decides to help him out.