My sister got a boyfriend! - That's fine, but apparently he's short... His sister is relatively tall, and the height difference between him and him is more than 10 cm, and it seems like he can't walk with his arms folded... More serious than that is his dissatisfaction with sex. - ! - Even though his sister loves him...As an older brother, he feels he must give advice on how to overcome the height difference, so he works with his short younger brother to solve his sister's problems!
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