Tactical Roar

Romance between siblings, cousins.

A list of anime containing ecchi elements, but are not tagged as ecchi by MAL. While the ecchi content may not be as prevalent or extreme as officially-tagged ecchi titles, there is still enough to be of interest to fans of the ecchi genre. Many of these register at least 1.5/3 stars on AniDB's "tag-weighting" system for ecchi.
Conversely, those who don't care for ecchi may wish to use this stack for cautionary purposes, as these titles may contain things like pantyshots, revealing outfits, incestuous overtones, oversized/jiggling breasts, swimsuit/lingerie moments, extended bath/shower scenes, lewd dream/fantasy sequences, innuendo, or general fanservice in an otherwise serious/"respectable" show.
Only the first seasons of franchises are listed. Some titles may (eventually) have additional details explaining why I've placed them on the list.

Part 1: https://myanimelist.net/stacks/24838
Part 2: https://myanimelist.net/stacks/26746

A collection of non-H anime with a focus on sibling relationships. The relationship between them must be the primary character relationship of the anime's narrative or have heavy romantic or sexual implications. Same sex siblings are only included if they are explicitly romantic or sexual.

This list contains anything with Incest Score 37-40.

You can find all my lists for this subject here:

Tier 1 - Incest Score 44-50:
https://myanimelist.net/stacks/48413
Tier 2 - Incest Score 41-43:
https://myanimelist.net/stacks/48414
Tier 3 - Incest Score 37-40:
https://myanimelist.net/stacks/48415
Tier 4 - Incest Score 34-36:
https://myanimelist.net/stacks/61124
Tier 5 - Incest Score 30-33:
https://myanimelist.net/stacks/55957
Tier 6 - Incest Score 10-29:
https://myanimelist.net/stacks/55958
Unranked:
https://myanimelist.net/stacks/48416

Explanation of Incest Score:
https://myanimelist.net/blog.php?eid=904530

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Tags: brothers, sisters, twins, imouto, otouto, onii-chan, onee-chan, wincest, family, taboo, forbidden, love, romance, blood, related, step, adopted

This stack lists various anime with coastal, oceanic or maritime settings. They may be "ocean worlds" or just involve shoreside locations (e.g. a seaside town); however, they all share a setting characterised by proximity to a marine environment. Naturally, each series has varying levels of emphasis on these nautical elements.

LGBT (gay, lesbian, bisexual, binary transgender, non-binary, genderqueer, intersex, queer, questioning, pansexual, asexual, aromantic, etc.) characters from anime-original anime. Some are headcanons- those are indicated by question marks.
Some of these anime may also have manga adaptations now.

Organized roughly by year.

part 2: https://myanimelist.net/stacks/68607