If you finished Whistle! and want your next read, these recommendations are not someone's opinion — they are computed from comic-lab's database of every manga published in Japan since 1968, combining three similarity axes (art style, setting, story) with real reader-behavior data.
1. Aoashi (アオアシ)
by 上野直彦 · since 2015 · 75 volumes in Japan · ongoing
Why it matches: close in setting & themes and story & tone.
Method: similarity is computed over cover-art embeddings, thematic categories and plot descriptions of 133,000+ works, blended with co-reading behavior. Volume counts and dates reflect Japanese editions and update automatically.