角川: a surname

独自: independent / 独自: unique

独自: being original / 独自: uniqueness

sound of heartbeat

throbbingly, such as with a throbbing heart

(onomatopoeia, often as どかんと) with force or vigor, producing a loud sound; with a bang or thump / (onomatopoeia, often as どかんと) with force or vigor, in great amounts

inside

中々: very, quite, considerably, rather, by no means (with negative verb)

very, quite, considerably, rather / by no means (with negative verb)

the daytime, during the day / a half day, half of a day