Childhood friend

Shunta and Tamaki are childhood friends with a year of difference, but Shunta feels something different towards his friend, an impure, not correct, dirty feeling.

As this feeling grows stronger, will the relationship between the two friends also change ...?

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I want to protect this little cutie!" I wished for that so hard, but that kid, Hanamine Rui, just continued to grow and grow and grow until I, Matsukaze Yuujirou began to worry. I've already realized these feelings I have for my 180-some centimeter childhood friend, but...

A story of a short but manly guy vs. a large but fluffy and cute childhood friend.

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From September Scanlations:
Hirono Yuusa always believed he was special and destined for greatness–until tragedy struck in his final year of middle school. Now, jaded and disillusioned, he’s completely given up on ever trying to be anything more than ordinary. But when he starts to notice classmate Himekawa Ichigo struggling to do his best against all odds, he can’t help but want to cheer him on.

From Lezhin: Childhood friends Ginu and Yubin live in separate apartments in separate buildings right next to each other - so close, in fact, they can talk to each other and see into each other's apartments through their windows. But Yubin's long-held secret is revealed one day when Ginu sees him doing something naughty through the window...

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To me, you're also a woman."
A cocky sadist with dual personality "Goat" and a head-strong delinquent "Wolf". One’s unstoppable when his mating period kicks in! Today, he’s in for sex even if it’s by force! And the other one’s too lewd for a beast that even a woman would be put to shame!?
A planet called Serian, which believes to be a twin of Earth, is where human beasts Yagi and Okami live. They both entered high school and was sent out to an infiltration training together. They were once close

From Lezhin: Eunho, the little neighbor boy that always asked Jaeha to marry him is all grown up now. Jaeha never gave little Eunho a second thought until one day, years later, Eunho suddenly reinserts himself into Jaeha’s life. Will Eunho forever be the little neighbor boy to Jaeha? Or will Jaeha finally see Eunho for the man he’s now become?

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Shunpei and Fumi are best friends and neighbours. One day, Fumi tells Shunpei he might be gay and has agreed to go out with another guy in school. Shocked at this sudden confession (but very accepting), Shunpei questions Fumi about all sorts of things regarding his newly-discovered homosexuality - subtly aware that he's disappointed that Fumi picked someone else over him - and, upon meeting the boyfriend, cannot take that Fumi chose someone who was more or less normal... like Shunpei!
NOTE: Chap