This is the quintessential "little" romance. Neither character is a loud Alpha or a Tsundere (hot and cold). Instead, they are both introverts (the "Hikikomori-adjacent" or simply the bookish type).
Example Plot: Two colleagues share a train ride home every night. They sit two seats apart, reading the same manga series without knowing it. For six episodes, they exchange bento boxes wrapped in furoshiki cloths. Their "first base" is accidentally brushing fingers while reaching for the same umbrella. little sexy asian japanese teen and big tits ho hot
These storylines rely on mono no aware (the bittersweet awareness of impermanence). Every small touch is a treasure because the audience knows that, in Japanese culture, physical space is a sign of respect. This is the quintessential "little" romance
If you are a writer looking to capture this aesthetic, ignore the fireworks. Focus on the five senses in cramped spaces. Example Plot: Two colleagues share a train ride
You have to re-train your eye to see the love in Japanese storylines. You aren't looking for the kiss. You are looking for: