Read the cover.
The mangaka's name is Ibu Hidekishi not Ibu Hideyoshi.

@Epimetheusbox
Thanks for correcting me.
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Some people may think author's name is 'Hideyoshi'.
To read kanji '秀吉' as 'Hideyoshi' is more well known, because it's same as a very famous person '豊臣秀吉(Toyotomi Hideyoshi)' in Japanese history.

This author's name is 'Ibu Hidekichi' actually, not 'Hideyoshi'. Name is written so, at the cover (see image #001, 002, 003).

@HGazer
not 'Hidekishi(ひできし)', but 'Hidekichi(ひできち)'

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http://www.doujinshi.org/book/409645/Shiritsu-Ranyou-Gakuen-Yakyuubu/

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