Attraction to the opposite sex with 異性
Kanji Explanation: Difference and strangeness with 異

During a ninja training exercise, Tsubaki disguises herself as the teacher’s assistant in the hope of getting close enough to take the teacher’s mask. When the teacher unknowingly reveals that keeping boys and girls separate has been aided by lying to the female ninjas about men being scary, Tsubaki accidentally drops her disguise. The teacher has no choice but to take Tsubaki into her confidence and explain the reason for the separation, starting with the word “love”, of which Tsubaki is unfamiliar.
- ハナ先生:
- 「異性
( に好( きという思( いを寄( せることだ。」- “It means harboring feelings of affection for someone of the opposite sex.”
- Literal: “It is directing feelings called 'like' toward the opposite sex.”
- 「年頃
( になると皆( 経験( すると聞( く。」- “I hear that everyone goes through this when they reach a certain age.”
- “It means harboring feelings of affection for someone of the opposite sex.”
Key Points
- In this scene, 異性
( means “people of the opposite sex” as a category, not one specific person. - The kanji help make that clear: 異 means “different” and 性 refers to sex/gender.
- 〜ことだ here is explanatory/definitional: The teacher is answering what “love” means.
- 「年頃
( になると」 means “when one reaches that age”, usually the age where romantic awareness starts to appear. - 「皆
( 経験( すると聞( く」 means “I hear everyone experiences it”, so the teacher is presenting this as something she has heard, not necessarily something she is speaking from personal experience.
Vocabulary
異性 (Opposite sex)
異性
( means the opposite sex, that is, people of a different sex from oneself. It is common in discussions of romance, attraction, friendship, and social interaction.年頃 (Of that age)
年頃
( means being of a certain age, especially an age associated with maturity, attractiveness, or a typical life stage.
See Also
- Grammar: Marking the direct object with を
- Grammar: Quoting and reporting with と and って
- Grammar: Natural result with 〜と
- Grammar: The copula だ