Synopsis
With their parents away on an extended business trip, their older sister Saki, who had been living alone, comes back home to look after her high school brother Kyohei.
One evening, Kyohei raises his juice glass while Saki raises her beer to celebrate their reunion after so long. Saki quickly becomes drunk and is guided back to her room by Kyohei.
After finishing his chores and returning to his own room, Kyohei discovers his sister sleeping there—
※This contains incest.
※The sense of guilt is subtle; the overall tone is sweet and affectionate.
Cover (1P) + Main Story (27P) + Admin Pages (1P)
Get “My Gentle Big Sister is Flat-C” on DLsite
This Week’s Top Rankings:
Editorial Review
[Jordan’s Pick]
If you’re looking for something sweet and intimate with a cozy, affectionate vibe, this one might just hit the spot. My Gentle Big Sister is Flat-Chested delivers exactly what its title promises: a tender, lovey-dovey story centered around a caring older sister character and the physical intimacy she shares with her younger brother.
The “sweet affection” tag really sets the tone here—this isn’t about dramatic conflict or complicated emotions. Instead, you’re getting straightforward romantic and physical connection presented in a gentle, feel-good way. The work leans into comfort and tenderness, which appeals to readers who prefer their intimate stories wrapped in genuine affection rather than angst or power dynamics.
The focus on specific physical attributes and detailed intimate moments suggests the artist has put care into visual variety and expression. For those who appreciate the particular appeal mentioned in the tags, there’s clearly dedicated attention to what makes this work distinctive.
The male protagonist perspective means you’re experiencing the story through his eyes, adding a layer of personal connection to the relationship dynamic. It’s straightforward storytelling without heavy plot complications—just two people genuinely enjoying each other’s company and intimacy.
If you’re after wholesome (in its own way) sibling romance with a focus on tenderness and specific aesthetic preferences, this doujin from Henhenta’s collection is worth exploring.
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